I have an end loaded OGGS and a BAL GSR. No handle flex.
I'm not hard on bats either, my GS is at least 1500 hits, including some BP balls that are rocks.
That bat is smoking. The GSR isn't far behind, takes a bit longer to break in (no break in really needed for the GS), it's a tad bit stiffer in the barrel though. IMO
for how cheap they are right now they are a great buy until utrip bans everything next year.