Because i am completely and utterly useless at doing anything that involves making or building things, and whenever i try anything like this, i destroy it. i have learned from my experience of the last 42 years, learned to recognise this about myself, and avoid doing it at all costs
Seriously i really am unable to do this. You are talking to someone completely incapable of sawing, sanding or filing a straight edge, painting a straight line (even with masking tape used! figure that one out!)
I really struggle even to put the stickers on vaguely straight on a standard 3x3.
So yeah - I'd prefer to use pieces that I can just snap together and know they will work, if possible