Pe,
You say just shy of the MVVS's 45cc motor, (bear in mind, we are not talking of a GRpro engine here, it's actually a RCGF motor) that makes it a very powerful motor, as we all know that the MVVS kicks butt, and is easily compared to a much larger engine.
As for the Rcexl ignitions, I have not come across another more reliable and friendly ignition. I am bias though as I distribute these in Southern Africa.

Sunnyday,
You ask if I would recommend the engine?? I think so, as far as the bit of testing ha gone, yes, I think it’s an easy and uncomplicated little engine, and for the price that one pays I think it's not bad. However, the engine I have has had about 25 minutes of running, and although it behaved, as it should, it will have to prove itself. I do not like the Ignition....I am not saying that its bad, but it's not proven. Grpro have gone to great length here to make it look like an Rcexl, but it's not, and the manufacturer admits to this, mentioning some other things about it that I will not mention here. I will hopefully fly the plane on the weekend and we will see how the engine performs in the air. (I have encountered engines that behave as they supposed to on the ground, and as soon as they are put into the air all fails) As for the power, Pe has very briefly stated what he thinks, as things are at the moment, I think a Zenoah will be more powerful........With it's magneto ignition there is very little that will beat the Zenoah on reliability IMHO.

As for me being stuck in the bush, I'm a born and bread Namibian 4th generation, of German decent. I like it here, you can fly almost everywhere, as we have no noise restrictions, as for scaring game, the Springbok sometimes become a pain in the butt as they stand around on the runway and do not scare very easily. Other clubs have their problems with Ostrich. It's a good place to live.
Attached find a photo of what we do here.
Regards
Andreas