LDS sells kits which are very similar, one straight winged, the other swept.

http://store.laser-design-services.c...products_id=59

http://store.laser-design-services.c...&products_id=7

I'm a jet inspector in Oz & recently checked the swept wing version for a friend fitted with a Kingtech
K80 & it flew very well. It 's first flight was from grass & there was no shortage of power.

Both of these list a P-60 as a suitable engine but I have a P-60 in a BVM Sabre judging by it's performance
from grass you would have to build the JetMach light for adequate performance from grass. - John.