I'm doing retracts for the first time with a Duellist I'm starting. A Duellist with retracts is about 9 pounds. I plan to use the Spring Air tricycle setup but want to keep the weight down. Does a 9-10 lb plane on asphalt need 3/16" struts or is 5/32" enough?

I'll more than likely use the same gear for a future Dirty Birdy build. (7.5 to 8 lb)