Strong,
Dont sell your engine, put the Wren into something else, like an AV8R, or something that is easy to get off the grass. I have retired my Reaper also for the same reason (untill next seaon when its getting a larger engine) but am flying my WRen 54 in my SPAD jet. I will build the AV8R as soon as the kit arrives (any day now) and if its anything like the guys I talk to say, its a good grass, short field jet...

There is allways a solution, you should see where I have to fly from sometimes!!

Andrew