early riser, with the lack of communication or other information from plotmaster i'd be skeptical about their product too. perhaps the company knows that their product doesn't sell or perform very well, and that is why they don't give you more info.

ask them if anyone else in your area bought one, and perhaps would let you see it in operation. but this is too time consuming, never mind.

post your same question on a couple of other hunting/qdm sites, and then wait a few days. i'd imagine that the responses you get will be similar to the ones on this thread (i.e. nobody has anything positive to say). print out all the responses and mail them to the head honcho of plotmaster. this will ultimately help you find an answer to your questions and solutions to your problems...(they work great, they suck, they are too lightweight, you can try a demo model for a couple of weeks, etc etc).