have a look at this mixer, what do u guys reckon of it..

http://cgi.ebay.com.au/BLOS-LPG-Mixer-R ... dZViewItem

What the hell?

Have you got any experience with SU carbies. they are a great concept that really performs well. A gas carb like that would work well.

GRA's are based on the SU as well.

and they seem very cheap in comparison to a GRA

Is this just a complex mixer?

I ask because I wonder if it would be compatible with a 'complex' convertor, specifically an OMVLr90.

yes it is seems like a complex mixer...so most likely u will need an impco or b2 style convertor...

The linked .pdf file manual gives instructions for setting the idle and sensitivity screws on a BRC converter. The OMVL R90/E has the same 2 adjusting screws. I'm not sure if this is big enough to make much difference to a Falcon though. The same document compares it to a 45mm venturi when fully open. The venturi on a Sprintgas system is typically 42mm.

Did the calcs, a 45mm venturi has a 15% bigger hole than a 42mm one, so it would make a difference, but not as much as one of the Airod units which is nearly double the size when fully opened out.