C4, I am not fixed to a "bit bigger" SMPL,
but the change in manufacturing would be very cheap.
Perhaps an other under 25$ 21700 mech mod tube would be better, tell us the name please.
And tell us please, how you would improve the SMPL construction.
Because the cheap 17$ Vindicator is now discontinued,
we can ask FT for a good under 25$ replacement.
I am open for every good 21700 tube mech mod solution.