Convert WeberQ 1000,1200,100 or 120 for RV connect and still have throw away bottle option. Cost is $26.93:
Parts from www.caloreequipment.com:
Model 250 Quick Connect X 1/8" MNPT $18.00
Model 250 Male Plug X 1/8" MNPT $6.00
Parts from Lowes:
Watts LFA-706 Brass Female Pipe Coupler (1/8" FIP to 1/8" FIP) $2.93
Steps:
1) Remove regulator by unscrewing the regulator from the WeberQ. You should end up with an exposed 1/8" MNPT (a male threaded piece poking out from behind the Weber's control knob).
2) Screw/attach the Watts LFA-706 to the Weber 1/8 MNPT that's sticking out.
3) Screw attach the Model 250 1/8" MNPT end of the Male Plug to the other end of the LFA-706
4) Your RV's propane hose should now just attach to the Male Plug.
5) Screw/insert the Model 250 1/8" MNPT end of the Quick Connect into the regulator you just removed from the WeberQ. If you want to make your Weber portable again, just push the Quick Connect end onto that new Male Plug you just installed.
Final note. Suggest using pipe tape on all these connects. Be sure to check for leaks.