Harnesses and bars for S2 with rear speaker pods

[nwk00]

Hi all,

be getting a harness bar soon, hopefully those familiar with my situation can help me out.

1) Lotus sells a harness bar itself. I see aftermarket ones from www.eliseparts.com and the spyder harness bar from www.race-speed.com. Are there any differences in quality and construction? Safety?

2) Can you use a stock seat belt in a motorsport seat? I read that you can't, but what is the reason?

3) Can you use 4-pt harness with the stock seat belt in a motorsport seat? If you can, is it advisable because I read on some threads that having both on the same mountings will compromise the function of the harness/seat belts.

thanks!