Hey everybody. This might be a really stupid question, but I'm looking for some clarification on this.

My friend and I just got into the hobby last month and split a core set, and I chose Seps. I put them together pretty easily, but I did not realize that certain parts only went on certain minis whose part numbering they matched (A6 belonging to the other A-parts, etc). I thought you could just put whatever legs you wanted on each one and call it good, so I ended up putting one of my B1 unit leaders on the kneeling legs because it looked cool and was different from the plain standing mini.

About a week later when we actually started playing, I read in the tournament rules that modifications to the height of a mini are not allowed in actual play. My questions are:

1. Should I try to replace this mini with another B1 binocular mini with the standing legs?

2. Can I sub in an OOM mini from upgrade expansion as my unit leader instead, even if I'm not using an OOM upgrade card?

And one more question on this topic: I also modified my Grievous mini with one of the extra clone heads that would've gone on the BARC. Grievous has his left foot perched on top of the helmet on his base. This makes him a little taller than he would be if he had both feet on the base as intended. Would this also not be allowed in actual tournament play?