and 212 with of course some insertion clearance therefore it may be necessary to increase or decrease the diameter of handle 302 to form barrel couplers 210 and 212 a third pin coupler coupler pin 315 is connected to the rear facing side of horizontal member 318 which correlates to the position of barrel coupler 214 on stabilizer barrel 202 coupler pin 315 may be fitted with a hole for alignment with hole 217 on barrel coupler 214 and for receiving safety pin 216 316 once engaged in barrel coupler 214 as depicted in the figure coupler pin 315 is approximately coplanar with the left and right portions of handle 302 and thus hidden by handle 302 in the side view coupler pin 315 or any of the couplers may be fitted with a hole not shown for receiving safety pin 316 safety pin 316 provides an extra measure of security during towing for engaging stabilizer 200 and cart 300 fig7 8 and 9 depict stabilizer 200 fully engaged with cart 300 with a compressed gas tank onboard in accordance with an exemplary embodiment of the present invention fig7 depicts a rear view of cart 300 and stabilizer 200 loaded with tank 110 fig8 depicts a side view and fig9 depicts a front view of cart 300 stabilizer 200 and tank 110 fig1 depicts cart 300 in the process of engaging with stabilizer 200 in accordance with an exemplary embodiment of the present invention in accordance with this particular exemplary embodiment each of barrel couplers 210 212 and 214 are vertically oriented top opening couplers on stabilizer 200 therefore in order to receive the corresponding pin couplers each of pin couplers 311 313 and.