I have 13 Nitro engines of various makes. I like to experiment and stick to what works.
The pics are from another post on as you said eb mods, standard and speed.
I know you swear buy Vspec, My experience is based on personal experience and fellow racers who swear buy the Vspec and Ive seen my bit of hassles on the Vspec. I dont get all the hype on the forums for susch an inferior built engine.
If you wanna talk qaulity create hype on any RB, Any Novarossi or derivatives.
the good eastern built engines are SH, STS, GoTech or same different branded. The OS Speed crank looks like it could be a different material(time will tell) but at the price!
I have 7 gallons on mine with barely any rod play.
I wish I had such luck with my Vspec. Believe me I would still be racing one. When it comes down to wasting money its another problem.
I will take a photo of my Vspec and show you the play after 6litres. The engine is barely runin.