That's an interesting thought DRP. I doubt that anyone would pay £140 or so for a set of Mk3 drums currently - even original ones. It cost me £20+ just for the engraving per drum. I appreciate that it's engraved on an indexed head but I'd already worked out the angles mathematically.
I will continue with the tube aspects of the project but.................. We'll see
Of prices etc etc. Several years ago someone was in contact with me regarding his old knackered Mk2 scope that he wanted rebuilding. He wanted the sort of price that I pay HIM to rebuild it! I offered him a complete set of brand new Mk3/L1A1 ocular OG and erector lens assemblies in the housings plus a set of brand new L1A1 range and deflection drum assemblies PLUS an imperial range drum so that his telescope would emerge as a Mk2/1. All thiese parts for something just over £100 (that's not a mistake. It reads one hundred) and he never came back. Oh, don't get me going......................
Now, I have to get parts made so know all about prices!