I'd suggest staying with shorter cycles. I once did a 4 week cycle with 1-AD and 4-AD and experienced a fair amount of suppression, enough to make me decide that it wasn't worth it. I think natural testosterone rebounds a lot quicker after 2 weeks. I'd either do a long 8-12 week cycle and deal with it post cycle, or stick with the two week plan. Anything else isn't worth it IMO. Besides...a 10lb gain with minimal fat increase, sounds like you've already found a winning formula.