I'd go with MarkD if anything, most of the other chips seem to make a questionable amount of difference. My car currently has an el cheapo Pro-Formance chip, but it runs rich and stumbles a bit at idle. I have the original chip as a comparison, but I haven't gotten around to checking for a difference.
How many of you would like one of my e30 318is chips? I will be happy to run some sort of group buy.
How about:
5 to 9 orders = 10% off
10 to 19 orders: 15% off
more than 20 orders: 22% off the posted price!
It would run like this: Order your chip from the site, quote this sale code: M42CLUB-GB
and soon after the sale ends, I'll tally up how many sales came in and send the discounts. I can also post every week how many orders arrived with the sale code so you have an idea where the discount is heading.
This group buy will run from now till July 5.
MarkD