In my opinion, ST 2300 was an overkill, it made the plane heavier, therefore increased your stall speed. You possibly either tried to land fast to avoid a stall and crashed, or slowed too much, snapped and crashed; leading to the destruction of the fuselage.

I have a YS 110 in mine, and it is more than enough. In my view, YS 91 is enough, because I think YS 120 is also heavy for its size.

If built light, plane really do not stall, it just mushes -if balanced laterally-, you can deadtick as many times as you can have, simply it will not have enough energy to destroy itself.

3D is not just about putting awesome power in an airplane, it is putting awesome power AND AT THE SAME TIME making it very very light, which makes construction very challenging. YS shines in that respect because it generates awesome power in a lighter package.

If a compromise has to be made, it is better to build it in a light configuration ( YS 91 ) than to have more power ( YS 120 ).

Just my thoughts...