AU 1 Tickford gas problems!!

[The Dok]

Am wondering if anyone else has experienced similar problems with their Tickford
factory fitted (99AU1 Fairmont wagon) gas system. About 3-4 months ago l began to experience "flatspotting" during light acceleration, ie:cornering/takeoff etc. Now l'm not a dummy when it comes to Fords but almost everyone l spoke to regarding this problem said "change the converter/mixer". I had the converter pulled apart by a friend/customer "auto trade" who said there was some wear & informed me @$600 for a new unit, at which time l instructed him to "re-assemble" it & l'd ask around. Long story short, another "customer/ LPG expert" gave me a "flow control valve", showed me where to fit it, then instructed me how to "gut the stepper motor" on the converter, & said if that don't fix it, then a new converter is required. Easy job to install, problem SOLVED!!!!! Parts cost, @$20. Drivability, priceless!!! Now another question, during my research, opinions varied whether Tickford converters (@$600) were performance enhancing, as opposed to generic converters (@$250). What l do know is there is no noticible power loss running on LPG in my AU, as compared to earlier models, (XF-EB) l've had on LPG previously, where there was a huge decrease in power, any feedback/experiences would be much appreciated.