Gonna be underpowered with a .61FX.....probably O.K. coming off hard surface, but not grass.....

We've got lots of flights on grass cut to 5/8" with a BP F-15...SpringAir Retracts with wire struts all around......always ran Dynamax Fan with OS Max .91 D/F and JMP pressure pipe.......still required at least 300-350 ft to come off grass...even more on hot summer day.......very nice flyer in the air....about 90-100 MPH.....

Don't know much about BP's delivery schedule nowadays......

Always was a nice kit, when you could get one....

Tom