I'm told I have a nice rack

[Bapu]

[bayoubill]

So many racks so little time 

[craigb]

I'm seeing new meaning to the term "twiddle some knobs."

[S.L.I.P.]

[Gswitz]

Do you have any heat issues with them stacked up like that?

This is in my compressor's manual...

The 162SL requires a two rack-space height (3.5 inches) and a standard 19 inch rack-space width. It can be mounted above or below (leaving 1U of space above and below the unit) anything that doesn’t create excessive heat. This is to ensure proper ventilation. Ambient temperatures should not exceed 113°F (45°C) when equipment is powered.

[InstrEd]

who ever told you that you have a nice rack was teasing you Ed?