Haha thanks! But ARCA Space is still my master in terms of innovation
For the losses due to the angle they are quite low. The engines are angled by 15°, so the part of the thrust oriented downwards is equal to cos(15°) × full thrust. And cos(15°) is approximately 0.966. So this represents 3.4% of losses, which is very acceptable.
But this was hard to find a suitable setup, especially that when gimballing the engines are more inclined to burn the tanks