I've got a 400... originally my plan was for it to be my rear handle for climbing. With the wrap handle kit, it's my go-to saw for almost everything now. Besides the wrap handle, I've muffler modded it, foam air filter, 461R oiler parts, and did some minor port/machine work.
At my actual job, I mostly run a 462R. I think the 400 gets compared negatively to the 462 too often. They are similar in weight, but the 400 is still 1/2 lb lighter and feels lighter than that IMO. The power isn't too far off either...until I worked over the 462, my ported 400 was actually stronger.
Mine has no issue with a 28"lwb...it could actually run a 32", but I've got my 500i for that.
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