Power lifter

I was just doing some fun thinking and was looking at the Rock Gnome Wonder Maker racial feat.

'Lifter.This device can be used as a block and tackle, allowing its user to hoist five times the weight the user can normally lift'

If a 3rd level STR 20 Rock Gnome Rune Knight Fighter, 6th level Bear Totem Barbarian with feats Brawny and Wonder Maker, would this be possible?

Frost Rune STR 22 - lift = 660lb

Giant's Might (large size) - lift = 1320lb

Brawny feat (Huge size) - lift = 2640lb

Aspect of the bear (x2 lift) - lift = 5280lb

Wonder Maker lifter (x5 lift) - lift = 26400lb

That would make 13.2 Ton. Did I make any wrong calculations? What type of fun can you have being able to lift that much?

Can you flavor the Wonder Maker lifter to be a Bionic Arm?

 . . . Probably gonna need adamantine cables. 

Well ×10 of that power is coming from archived UA, but yeah I think that math adds up.