The bender he mentioned is definitely not big bucks, but it looks like he has had good results, I'd be curious to narrow down the differences.
Evidently Dave at Lowbuck doesn't build the same style bender that uses Greenlee shoes I purchased over 30 years ago.
This is what he offers today.
This what mine looks like, I run it with a OTC air over hyd pump.Cycle time for a 90 degree bend on 1-3/4" .058 4130 is about 10-12 seconds.IIRC I paid $850 with one set of dies and a hand pump that was soon ditched for the OTC pump.
Mittler Bros. is popular also 9 deg Hydraulic Tube Bender by Mittler Bros., most dies today are machined from plate instead of cast Al. which allows bending .125 wall 4130.