Also it looks like you've tried to model the leg as an independent piece from early on - it's probably better for something like this to not do it that way and instead just try and build one top part as just one seamless and more simple structured piece and then once you've got the whole thing built then you can carve that up into separate interlocking parts rather than trying to do things as separate pieces initially. Especially if you are going to have fillets running right through those cut areas, it will make things a lot more difficult for the filleter to try and deal with a lot of separate parts, you'd want to do the fillets on large simple parts and then cut right through the fillets at the end to separate things.

Hope that makes sense...

- Michael