If you have a radio that does not have mixing, you are almost going to have to use a y harness. If with a Y harness one of the throws is backwards, you should just need to move the contol rod to the other side of the servo arm. I have no talent when it comes to soldering so I get inventive in other ways. Now as for the fellow that that has been in the hobby for a long time and has never seen a transmitter with out a servo reversing switch, I would love to show you my MRC Mark 5 transmitter. It was considered to be a great radio in the late 60s and no reversing at all. Hope this help's, Dave