That conversion works pretty decent, i think thats basically what Bjoe is doing. all-thread can be purchased at most hardware stores and I think HT has it. I personally would use brakeline and 6-32 all-thread with Dubro 6-32 rod ends. I would also recommend moving the servo to the axle and putting the batteries on the axle.
Once we get the club together Im thinking a work day for eveyone that wants to get into crawling should be #1...until then I have no problems helping anyone build a crawler that needs the help. I'm sure if you went into Naperville HT when Zach is there he would be more than happy to help also (I like volunteering him!!!!

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