At 940 mm centres, it is the equivalent of the earlier Warco BH900, (A long bed version of the BH600 )
The gap bed allows you to swing 18" if you need to, although at some cost to rigidity, I would imagine.
In 18 years of use, the largest that I have turned has been 6.125" diameter, off centre, without ever touching the removable gap. Used the Faceplate.
Mandrel thread is 2.25" X 8 tpi Whit form.
Belt drive will be quieter than a gear head, and has the added safety feature of belt slip in the event of a jam up.
If you have, or can get hold of them, the following might be of interest.
December 2014 , MEW 223 featured my BL12-24 in One Man and His lathe.
August 2016, MEW 244 relates how the bolt in the Fixed Steady was made captive.
April 2018, MEW 2166 gives details of some of the mods made to my BL 12-24 which is a Craftsman lookalike,
So some of these items may be applicable to a Chester Craftsman, or Warco BH600, or even a Warco BH900
With regard to power requirements, the Craftsman comes with a 1.5 hp single phase motor. Mine has a 1.5 hp three phase motor, run from a VFD. The VFD is fed from a suppressed 13 Amp socket.
The BL12-24 was specified with a 2 hp single phase motor..
I have taken cuts of 0.100" (2.5 mm ) depth in steel, without any problems with either machine power or supply. No blown fuses or tripping.
With 1.5 hp it is possible to damage gears, in a jam up, as i know to my cost!
So, I would think that 3 hp, (Where did that come from? ) with he attendant power supply problems would be an overkill, and a danger to the machine in its entirety..
13 Amps is 3.2 KW on a 250 Volt supply, which is a 4 hp INPUT.
Nothing is 100% efficient,so you would not see 4 hp at the tool, anyway.
Stick with the standard motor.
If your work REALLY requires 3 hp, you are moving out of the hobby lathe market, and should be looking for an industrial machine, but it will be much more expensive, as will accessories..
Howard