Astrum
Sure, you should definetly not try to copy my design, although taking inspiration is fine, some good tips are:
-Predicting the fiering arc of the weapons, and building the slope of the triangle accordingly;
-Predicting where the enemy's projectiles will come from, considering it's a triangle they won't be coming directly, rather at a steep angle, and positioning your shielding accordingly;
-Always try to make the frontal pine cone as small as possible, it saves up on money and weight, it's an essencial but not that important part of the triangle, although it can be used effectively for defense (also do the stope on it according to the weapon's fiering arc);
-Make the weapons and then place the thruster modules inside of the triangle based on the shape that the weapons create, that keeps all the angles consistant, and shouldn't interfere with the thrust;
-You really only need about 2-3 CRs on these designs, maybe even put one, and generally on the thrusters down the center, because if people even get there you're most likely already incapacitated.