Be aware, if you are not already, that your insurer might not be very happy about your “modification”, however high the quality of your work.
If you don’t tell the spivs and they find out, even if the modification has nothing to do with that, they will likely void your cover immediately and make it very hard and costly to renew it.
Car insurers are money-traders who appear not to know which end of a screwdriver is which for stirring paint, but know all about screwing most money out of us at least risk to them.
My car is a Renault Kangoo modified by a leading conversion company to take a wheelchair, and even though the work is professional, properly-designed, “type-approved” and the like, some insurers refuse it merely for it being not as off the Renault assembly-line. (Wherever that is these days…)