What about actually mounting the harness - most manufacturers seem to offer reinforcement plates but they seem to be steel.
The thread on the 6-pack from sector111 brings up a point as why this *could* be an issue on a lotus. Most vehicles you're attaching to steel - with the lotus it's aluminum - is galvanic corrosion a valid concern ?
I put in the sector 111 six pack and feel it is a better more secure solution for the seat rails. The stock design is very prone to thread stripping if you tend to remove your seats regularly. With regards to galvanic corrosion, it is a real phenomenon and should be watched. If there is moisture and an electrical charge present it will happen very quickly. It can be mitigated by using gaskets to separate the dissimilar metals.
2007 Lotus 255 Cup, AP BBK F&R, Innovative mounts, RLS CF Intercooler heat shield, Railer diffuser, Custom hood Pins, gPan, Saikou Michi oil cc, RLS AL Intercooler tubes, Radium FST, 2Bular GT3 8X24, RLS suplemental IC Scoops, APR canards, CF rear wing, CF Scoops, Radium Fuel Rail and AN fuel pump adapter, AN fuel lines, 2bular decat and headers.