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If there's any question about "is it enough?":
1. biggest possible improvement is to go larger diameter until it won't fit - there is no 10mm or 13/32" OD commercially available, but it would help if 7/16" won't fit.
With same .120" wall, and rating 3/8" as 100 units for a base:
10mm = +21%
13/32" = +36%
7/16" = +80%
1/2" = +198%
2. increased wall thickness is far less effective, only do this when #1 is not possible.
Easy comparo for pushrod wall thickness: it's pretty close (never exactly) to new ÷ old.
.120" ÷ .083" = 45% stiffer

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45% stiffer,if only I duplicate that.Bigger is always better,so I'am told