Sir -

If you have a chance to come to the Nexus, would you perhaps be willing to talk to some friends of mine about the work I did for you? One of their number is considering similar work, and I think it might put their minds to rest to know someone else has had it done.

If it is not possible for you to speak with them, I understand - you are exceedingly busy right now, after all.

I hope things are going well with you.