I built a 4*60 kit for a second plane. This is a kit I'd say most anyone can build with little effort. Being mechanically inclined I made a couple minor adjustments- installed larger fuel tank than recommended (increased flight time) and fabbed a fuel hatch so I could get to the fuel tank to work on it-should I ever have to. Installed a tower hobbies .75 2-stroke engine. Upon take off only 3 clicks of trim was needed on aileron and 3 on elevator. Futaba 6EXA radio 70 & 120 % rates for ailerons and elevator 140% on rudder. Expos at -30 for aileron and elevator. This plane flies like it's on rails. No sluggish response, no unwanted suprises. The plane flies great and does what you tell it to do when you tell it to do it.

I don't know about the Mid* as I've never built one.

Just my two cents worth on the 4*