OK, mine arrived today...1 week cross country...tested it...it inflated my inflatable faster than my 2 gallon shop compressor with no topping off necessary...very impressive.
Thanks Norm for the post...though I have not used a portable pump for a long time this will allow me the luxury of traveling with my Nav II deflated at times.
Incidentally , re: the valve position thing ....some of the attachments have a cross piece in them so the Halkey Roberts valves are depressed during inflation without locking....the attachment could be adapted to a hand pump...if you want to use one..... so one isn't pumping against resistance.