I fish a all weld flat bottom river boat and had to mount a ram mount also, I found some 1/4 " aluminum and made a piece to mount on my braces. Think mine sre about 11-12 inches apart, mounted the plate to that and then the ram mount to the plate, much more secure.
I wouldn't trust it, in rough water those things take a beating, the mire secure the better, hate to see my Mega 10 go down
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