Hi Hammy.
Now you have all your parts of the project together the fun really starts making them fit.
I think your major issue is going to be the difference in heights of doors/side profile of the mx5 vs the Lotus. Draw a line on both cars that joins the top of the wheel rims together and study what is above the line on both cars. The side sill and scoop on the red lotus is going to come in handy for hiding some of that issue, as will the front spoiler.
Keep at it
