No but when I mounted my TV wall mount I used a 3/4-inch flat board up first and anchored it to the wall with its four corners using MOLY BOLTS. Then screwed the TV mount into the larger piece of 3/4-board.
Those thin walls are just way to thin to support very much weight.
Something like these photos...
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS