New2grammar“We created a prototype to ______ (attract/solicit) feedback ? ”
To me, this is too condensed to be practical, unless considerable correspondence has already occurred. (And I still object to "create a prototype." If you create a prototype for a client, he will be the first client to ever see your product. A prototype typically precedes R & D. I've been involved with things like this where a good customer was sent a prototype for comment. My problem is, your question was framed in such a way as to imply that your product was already in full production, but unknown to this particular client.)
"We are shipping you a working model of our new product at no expense to you, and we encourage you to put it through its paces. Please inform us of any problems or suggestions you may have."
In a followup letter, you might say, "Do you have any feedback on the product we shipped to you?"
The circumstances are too complex to try to fit into one sentence.
- A..