Hello folks! I am helping my brother assemble and paint a small force of troops. The basing instructions in 3rd (brother picked Third Edition based on the apparent consensus that it is the best of the bunch) edition seem very loose, which is, on the one hand nice, but on the other hand makes my brain itch, as I have much more past experience with systems with comparatively explicit basing requirements. My impression is that no-one really cares that much and the cool kids will still let us play, even if our basing is slightly different from theirs, within reason. Is that correct?
I have seen a huge variety of basing schemes in photos of other folks' troops -- sizes, shapes and number of figures to a stand seem all over the place, but of course, people rarely specify what rules they favor when posting glamour shots of the troops, so perhaps some outliers are not for 3rd Ed.
The "getting started" section of Third Edition shows, for general infantry, five figures on a long skinny strip, provided with the figures. Some of the troops bro purchased (mostly via Ebay) are based this way, on 10 x40mm rectangular stands. Others are 5 models on 20x20mm squares. Are both OK in 3rd Ed?
Question 1: Do size and shape actually matter (within reason). Would round bases be OK as long as they were about 400mm in area?
Question 2: I have spotted some epic scale troops in big mobs, like 20 models on a big stand--is that for a different rules set than 3rd Ed?
Question 2.5 Is five per stand most common for infantry?
My understanding is that infantry support weapons should be based one-to-a-stand, with the weapon and 1-3 crew, as appropriate.
Question 3: Should these also be on 20x20mm stands (or equivalent)?
Question 4: Is there a preferred base size for individual heroic type leaders--like 10mm bases for example, or should they be on 20x20s too, perhaps with an entourage?
Question 5: The 3rd Ed Getting Started suggests 40x20mm bases for bikes and cavalry. Would 35x 25mm be an acceptable alternative? (Brother has a lot of these left over from FOW

).
I am probably overthinking this, but I would prefer some feedback before getting out the superglue. I am not that familiar with the rules yet, being mainly interested in the painting part, and later building some terrain, but I am looking forward to some games, eventually.
Thanks!