Keep light equipment from tipping up from cable weight?

All of the above. Similar problem with a heavy Transparent PC into my Zenith MK3. I have a Herbie’s Tenderfoot underneath the plug to prevent it’s coming loose (the plug also has a few wraps of plumbers tape). It also prevents the Zenith from tipping due to the weight of the power cord   Between the pc plug and the Tenderfoot is a metal “cradle” like the top unit from a FURITECH NFT support bout cheaply from Alibi which supports the application perfectly.  
 

Unfortunately A’gon doesn’t allow pics so I can’t show you. Email me if you want pics  

i also a Tenderfoot under the back of my Chord DAVE to keep it stable and prevent the front from tipping up.  There are two Tenderfoot sizes depending on how tall your unit is.  They can be combined.  There is also a wooden height extension.  
 

Rebar chair, Home Depot, Lowe’s, Amazon about 80 cents each. 

VPI magic brick is perfect for this!

These weigh about a pound.

I purchased one for my wife last year (anvil is cool/box is cardboard).

http://www.alloykats.com/acmeanvil.html

DeKay

dekay

I purchased one for my wife last year (anvil is cool/box is cardboard).

http://www.alloykats.com/acmeanvil.html

I've found Acme products to be very reliable.