Reddit mentions of Gibraltar SC-4429 3 Hole Platform Mount

Here's my tried-and-true setup advice:

1. Take your drumset completely apart, down to its component items.
   
   
2. Begin with nothing but your kick drum, kick pedal, and throne. Set your throne height so that your legs, feet, and ankles are at comfortable angles. You'll probably want your knees somewhere around a 90 degree angle, give or take. Put your throne wherever it is most comfortable behind the kick drum, distance-wise. Orient it so that your hip, thigh, knee, foot, and kick pedal are all in a plumb line going straight through the bass drum perpendicular to the rim/head.
   
   
3. Add the hi-hat in the same fashion, with a similar plumb line running though your left thigh, etc. right through the pull rod.
   
   
4. Add the snare drum between your legs. Adjust it for height and angle, so that it is at the most comfortable playing angle for you. Adjust the height and angle of your hi-hats until they are in the right place relative to the snare.
   
   
5. Add your ride cymbal, adjusting its location, height, and angle to whatever feels best for you. You may find that the best place for it is slightly over the top of the right side of your bass drum, where a rack tom usually lives. This is fine.
   
   At this point, you have placed the very most basic components of any drum kit where they make the most sense for you. Any pieces added beyond this step that may disturb the arrangement of the previous components are to be relocated, or discarded entirely. (Looking at you, middle tom.)
   
   
6. Mount your toms in the same fashion, putting them wherever they make the most sense for you. Note: the most sensible thing to do may be to mount one or both of your rack toms on a cymbal stand, using one or more multiclamps. One of these might solve all your problems by its lonesome self. Set up your floor tom for height, angle, and location, wherever it feels best.
   
   
7. Add other cymbal(s), again without disturbing anything else.
   
   
8. Set every memory lock on the kit to these positions, so you don't have to do this shit every time you take your kit apart for gigs, etc.
   
   Voila. A perfectly ergonomically assembled drum kit, for you and you alone.