I was wondering if anyone could supply information or an opinion on the Bacharach Stinger 2000 or the PROMAX RG5410 recovery unit. I expect to only use it occasionally, so I'd appreciate any input that you can provide about which unit to get, or would it be better to go with the Appion G5 or the INFICON Vortex. If you have one would you recommend it? They are all in the JS flyer and seem to be priced OK. I will be doing basic residential AC /HP and I'm looking to to move into all climate air source heat pump systems before too long. Any guidance you can provide is appreciated. I haven't done any real refrigeration work since before the Montreal Protocols, so I'd say I'm due for some new tools!