RE: SIG 4* VS GP Spacewalker
Don't know about the other, but the Spacwalker is a nice easy flying plane. Do not over power it. The firewall is thinner than the one one my WM SS40S ! I REALLY over powered mine BIG TIME! I REALLY wish I would had went no bigger than the OS .70 Surpass or equal. The YS .63 would have even been enough.
Nice flying plane though,
Dennis