I was thinking about your mid-engine idea, are you going to have room for the air tank or will you with electric retracts? I just made a deal with a guy for an extra set of # 605 Robart gear they are 90 degree but with a little work should work fine.
I asked Robart why I find more than one gear listed for different TF kits and they explained it to me. The less expensive gear with the wire legs are entry level and designed for builders on a budget or want the more forgiving spring wire when you make a less than perfect landing. The 5/32" wire can handle harder landings without damage than an oleo strut. The more expensive sets are more scale. Robart is trying to give us a choice. I think I will stick with the wire on the mains until I prefect my landings and then change over to oleo struts.