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All contents (including photos and drawings) - ©  2020 Derek Mackenzie Listowel & Ballybunion loco replica Listowel & Ballybunion loco replica on turntable at Listowel

23rd January 2021

       The enforced rest for my thumb has resulted in concentrating on design work for a few weeks. I have now arrived at construction methods and materials that finally enable me to produce extremely detailed, highly accurate coach kits at a viable cost with a profit margin that justifies continued developments. This enables me to produce the kits at a price around the £400 mark. Prices may vary around that mark as material costs vary depending upon the actual coach. I am trying to maintain a fixed actual profit (rather than percentage). See here for current coach specifications and here for a list of coaches I will be producing.

The GWR Railcars will obviously cost more as they require motive power (Steam or Electric for the SRM, Electric only for AEC Railcar) and include my R/C system.

See News Archive pages for earlier news

1st February 2021

       Carriage design continues - the specification page (see here) now has sample instruction drawings for the LMS PI suburbans. Expect similar fast progress on other coach designs as workload permits. All the design issues have now been worked out on the LMS carriages so should enable fast development for others.









23rd March 2021

       Carriage design continues - the LMS suburban designs are almost complete - just the etched bits to do.

I have designed a lathe attachment for my Taig CNC mill (which will be upgraded to ball screws) to replace my less than totally accurate converted HobbyMAT - see picture left. I will be making this as time permits. It should provide me with greater speed and accuracy all within the original mill enclosure. It will also release the space taken up by the old lathe allowing me to reuse the space for my new acquisition - an Elegoo Saturn 3D printer. This provides me with a greater build space for larger parts and much greater speeds.

A customer has requested a GWR Collett Goods (2251 class) so that has now moved ahead of the Bulldog in the build schedule. Conveniently it uses the same tender - the first 60 of the 2251s all used recycled tenders from the 4-4-0s that were being scrapped at the time. The last 60 (1940 onwards) all used the new Collett 3000 gallon tender, but since that tender is almost unique to the 2251 class it is unlikely that I will be making it.

6th April 2021

     Illustrated instructions have been uploaded to Google Docs for the GWR 3000 gallon tender (Lot A49 of 1901) - you can download them from this page.


     The mechanical design for the Collett Goods loco is now complete - just need to do the 3D modelling in Solidworks then turn all those parts into etches via TurboCAD.


The lathe design continues to evolve. I look forward to making it and turning lots of loco parts!


As usual multiple projects continue to progress simultaneously - too many to enumerate and 70 hour weeks are too short to do it all.

11th April 2021

       The mechanical design for the GWR Collett Goods is now complete and has been 3D modelled in Solidworks. See here for a screenshot on the Collett Goods page.

17th April 2021        Minor changes to website - updated pictures on Coaches & GWR Collett Goods pages as designs progress.

30th July 2021

       I have improved the navigation around the website by adding links to the price list so you can go straight there to see what is (or will be) available (see the loco price list - here) and then just click on links there for anything that interests you. The webpages sometimes have limited numbers of drawings on them. If you need more information I suggest you download the appropriate illustrated assembly instructions - they usually have full 3-view drawings and X-sections of the loco.

     I do not seem to have mentioned in the news items the highly detailed backheads I am now putting on most locos - certainly all future ones where the information and photos are available - so have a look here at some I am now doing.

19th August 2021

       The GWR AEC railcar prototype is progressing well with the (almost correct) test printing of 3 different ends.

Also added the SECR H class & SR Q1 back into the price lists.

12th September 2021

       Loco etched sheet costs corrected - they were too high before. Price now showing “from” the cheapest available.

Design for the SECR Birdcage coaches being finalised - now 1/32 scale instead of 10mm.

26th September 2021

       As a result of several requests I have introduced the LSWR T3 into my build schedule - timed to coincide with the re-introduction of the full-size one to service at Swanage. Probably 2023.

Expect a price similar to the LSWR T9. From a modelling viewpoint this a hybrid of the T9 with the outside cylinders/inside Stephensons valvegear of the Adams Radial Tank so a fairly simple bit of design. Probably the trickiest bit will be fitting everything into the 6-wheel tender.