The MVVS on glow should be quite powerful. I broke in the engine and it will spin a 18x8 master airscrew @ 7600-7700. I still need to finish the break-in and see what happens. I used stock muffler on break in but have modified it since and anxious to see the results (added a second exhaust outlet). I also learned that MVVS now reccomends 10% oil content for these engines on glow and will try that too. My friend has a MVVS 2.15 petrol converted to glow which is awesom, spinning a 20x8 master @ 7700 (over 4HP). If push comes to shove, I will substitute that engine for mine.
Still looking for comments on the struts gap. Will check incidence as soon as I find the time.
Thanks.