Thanks Stan, very good of you to reply. I expected a case of suck-it-and-see! Such are the trials of this hobby, auditioning new kit!

I just have to fund a few more ridiculously expensive parts for an amp project someone is doing for me before I get a Bushmaster, but I shall definitely want to trial one soon. I'll let you know how the LDR/NVA combo works with your new baby.