Hi welcome to the forum.
I completely missed this thread & in particular did not notice your location
Plenty of sound advice has been given but i'll echo Trophy Blue .... More than happy to pop over & have a look at your buid, less than 10 miles from you here in St Hilary
If you want to pop over to look at my chassis at any time, just give me a shout .... It may be helpfull if you need to measure some of the chassis reference points to assist with your MX5 conversion
Yes, there are quite a few build diarys & blogs to be found on this forum.
I am sure someone will point you in the right direction & put some links in for you.
Enjoy your build