Hi, jimbob
Just starting out on OO Garden Railways and trying to get to grips with the most suitable track base.What have you been using on the Minfford Railway for the track base, the platforms etc - it looks good from your videos and I like the grey colouration.
I was in contact with ba14eagle about using recycled plastic component supplied by Filcris Company:
https://www.filcris.co.uk/category/garden/garden-railway-products
and he mentioned he'd used it successfully, and that you were using a similar product. He also referred to possible problems with expansion/contraction due to temperature changes. Can you confirm what you are using and the supplier and also advice for me of any pitfalls or problems.
I think your videos are great and fill me with enthusiasm to get out in the garden and start the project!