New X4 owner, Q's on engine tuning

Hi all, new member here. We just picked up a lightly used X4, carbon black/black and I want to do a tune. Searching here, there are practically no threads on this forum. With all the action on the 335/135 forums, I thought there would be more chatter here. A good friend has had 335's with Proceed and JB4 and as such, looking to do Burger's Stage 1 tune but wanted to hear from members with it on an X3/X4 platform. Any help or advice with this tune or Racechip, (others?) etc. would be appreciated.

Thanks,
Jeff

New X4 owner, Q's on engine tuning