I have both the 20 and 410. I like both of the guns and have no issues with my setup. I'm running sumtoy base on both and a sumtoy 562 in the 20. Shoots give or take 275 in the 10.
Only con for me, both guns poi/poa is not good with bead. Both shot way low. But you said you had plans for a sumtoy mount. You should be good to go.
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