Thank you for the previous reply about the carbs. I picked up one of the 24069's. It looks identical to one of the RB carbs I have (off of a ws7 III), except that the LS needle is shorter. They both have 2 sets of o-rings, but one has a shorter tapered section. Do you know if I can swap out the shorter needle (in the RB carb) for the longer one from the 24069? If not, what would be the disadvantage to the shorter needle? Also, I went to your website, and couldn't find a contact link (I may be blind btw). I would like to send you a motor to have modded. Thanks again, Jeff.