Is challenger still in business

[Hoss]

Challenger OP 3/4 HP weight: 113.0 lb 15" drive plate

Lowboy SEK 3/4 HP weight: 80 lb 17" drive plate 19" oscillating path

I would go with the Lowboy. For me, the 15" drive plate is going down a bit too far for primary productivity. I have a little Oreck with a 12" drive that can get me in and out of tight spaces. In an efficient setting with a team of two, I would have an Orbot or Cimex scrubbing out in front with a Lowboy padcapper following behind.