G'day Gabriel,

I've just checked on this one having previously tested out the 3 Burner hotplate with this stove - it looks like they're slighty changed the design of the handle and handle tabs, which now make this hotplat a touch too long.
Unfortunately theres very little option for an alternative hotplate - they're all either a touch long, or far too short, or have attachements specific to click into other model stoves.
Noting the 3 burner plate is only a touch too long, you could make a small wire loop from a paper clip (as an example) and loop through each windshield allowing them to still be hooked into place.
This would allow you to use the hotplate you have.

G'day Gabriel,

The supplied BOM arm cannot by bypassed, regardless of disposable propane bottles, or LPG connection.
The hose you need should be BOM to 3/8th BSP or LCC27 - depending on the gas bottle connection you have.

G'day Brad,

1Mj equals approx 20g of propane gas, so based on the fuel consumption rate of 37Mj per hour, this stove will use up to 740g of propane per hour.
You'll probably get around 45mins of solid run time from one cylinder.

G'day Paul,

You will need an extra hose to connect this to an LCC27 bottle. The maximum hose length for this stove is 1500mm. 

You can use the Companion POL to BOM High Pressure Gas Hose 150cm or the Coleman BOM/UNEF to LCC27 High Pressure Gas Hose to connect this stove to an LCC27 bottle. 

The Companion Proheat 2 Burner Low Pressure Stove comes with an LCC27 hose as another option!

G'day Brian,

No, it doesn't.  You'll need to grab a separate companion hose which you can find here.
Hope that helps!