JSD - sorry to see you've not had a better response to your request. My experience with Airserv only comes from heresay whilst in Kenya and I went for a chat/interview with them in their Nairobi office in 95 (ish). They came across as a professional, well organized outfit operating well maintained equipment and doing some really interesting work. If I had been single I may have given it a go. Good luck once again - Rafiki.