I picked up one of the WD kits, by then under the McGowan brand I think, in a half price closing down sale at Quality models in Heanor about 35 years ago. He was selling of a lot of stuff off, but being out of work, with a young son at the time I couldn't afford much. Can't now remember whether I paid £5 or £10 for it, but anyhow it kept me quiet for a while.
No idea where I would get a 141R chassis from, so scrathbuilt my own, drilling out the axles holes with an ancient Black and Decker industrail sized drill. The valve gear was mostly Nu-cast B1 bits turned inside out to give a plain section on the outside, with scratch coupling rods also drilled using the same machine, it wasn't particularly steady or true but somehow that chassis worked, even using the discarded wheels from a K's 04, and a borrowed XO4 motor from an old Triang Princess.
As we had a black car at the time (Triumph Dolomite 1850, that was quick enough, the sprints must have been something else!), I used the gloss black spray can I had to paint the ozzie, as we knew them around here. It looked dreadful but some heavy weathering made it look much better to my eye.
Around the same time I picked up an MTK standard 5 from the York show 'club' sales stand for a tenner.They also had a DJH one but at £30 it was well beyond my then limited means. That also got a scratch chassis and borrowed XO4 and ran.
These are nowhere near the standard of todays stuff but kept me occupied, must get them out of the boxes again some day see if they still look OK. Personally I suspect I'll look at them with my rose tints on, others may be horrified but I've only ever sold on one kit that I built and that was something I picked up second hand part built, so it wasn't really mine and as it wasn't really anywhere near my interest at the time, decided that I needed the few pounds it brought in more.