RE: engine for LST2
The D30M has the potential to exceed Novarossi engines with some mods, a good choice in pulg and pipe, and with a good tune (actually, on the leaner side). The thing of course is, since it is a Chinese product, the materials and metallurgy are inferior to that of Novarossi and even picco. That is why it is leaps and bounds cheaper than the Italian engines.
But for an LST, I say hell with it and put one in. I have a D30M in my daily basher Savage ant it is loads of fun! In an LST, I gauranty you will definietly enjoy it also.