I don't think you should have the gear and flaps mixed together, as there could be an instance when you will want gear without flaps and vice versa. Program your gear on Ch5 and your flaps on ch6 and then you can do some mixing with a PMX that you create between the two. The flap/elevator compensation is already one of the factory PMX in the radio. Go in and find it and adjust it as required thru trial and error. I am sure there is a way to accomplish what you want, but it might be a serious challenge!

Daryll