Out of two adult collecting phases I've had G1 Sixshot twice so all up I've had him for about 10 years in the last 15, and in those 10 years I always thought how stupid his legs were because they angled our from his waist/hips making his him rock side to side when lightly bumped on the shelf because his feet weren't flat.
So at the moment I'm in the midst of a remodel of the collection room and with that comes wonderful little discoveries here and there.
Turns out that I have never transformed Sixshot's legs right!! I found out last night that by pulling them out (sideways as you look at him) at the waist/hips area it makes them straight and the feet flat on the deck. (Insert facepalm emoticon)