I built the "Poke" and I am pleased with the results. I powered mine with the OS-52 4-stroke and it is a good match for the plane.
Take a look at the thread referenced by Bruno for additional tips. If you do decide to build the "Poke" just make sure you add support to the wing struts with tooth picks or something similar. Again, read the "Poke" threads and you will get a good idea what needs attention.

It is a good flyer and a lot of fun. I recommend it.

DaveB