Theres not much to it... Just a Century speedbag platform with cheapo swivel and vinyl 10x7 bag, a Ringside 70lb heavy bag, and a Schwinn exercise bike. Excuse the boxes all over the place because I just moved. The footstool is for my stepdad who likes to punch the speedbag sometimes, but is quite a bit shorter than me. It's easier than adjusting the platform all the time.
Here you can see this is my little corner of the garage:
Heres the speedbag setup:
You can kind of see in the last picture how the bag is getting lopsided. Also, you may notice that the top left bolt is drilled at an angle going thorough the stud. This is because that was the last hole I drilled, and I hit a nail
. So instead of moving everything down an inch and drilling all the holes again, I figured I would try drilling at an angle. Surprisingly it is very sturdy. And with the blue playsand on top, there are no noticable vibrations.