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Well I'm replacing my (03 sno pro firecat chassis) track with a attack 20 128", 3.0 pitch and A/C Ext. drivers. Problem is drivers and rails can't occupy that same space so rail need to be trimmed. My question is how much do I trim off the tip of the rail? Yes I am looking to put anti stab kit in as well. If anyone has done this setup how much difference is the gearing from the stock 2.52 drivers?