RE: balsa usa phaeton 90
I had a 3.5 lb gas weed whacker conversion on my Phaeton 90 hence why it was a must to beef the landing gear. The stock struts were used with the addition of a spreader wire. The wire was constructed of 1/16 stainless aircraft cable using wire crimps. Two pieces are sized and made up with loops on the ends with one end having a slightly larger loop. The larger loop goes over the axle and then the wire is run over the soldered joint of the two struts giving the wire reasonable ground clearance. The two smaller loops are joined in the middle by a small stiff spring from Lowes Building Suppy. A piece of heat shrink over the spring and cable clamps provides a reasonable appearance.
btw... I was going to fly the Phaeton last Sunday and the conversion engine wouldn't start. Test show the magneto CDI ignition has cratered. I've been flying the plane with the conversion for about a year and a half on the $12 (carb kit) motor. I doubt I could find another ignition considering I don't even know what model of motor it is. I'd have to go battery ignition and I don't know if the motor is worth that effort or cost. The motor produces 7,400 max rpm on a MAS 16-6 prop in comparison to a Zenoah G-20 that is lighter and will produce 9,000 on a APC 16-6. The conversion yields realistic performance only... and I believe the Phaeton would provide a little more fun with a bit more go.
I'm leaning towards the G-20. Either way should allow fitting the cowl, not doable with the flywheel ignition.