I have used Mike at Green Travel in BKK for 3 RTW tickets, with no problem. He has always been very responsive.
The ability to use e-tickets seems to depend on the routing. My most recent RTW itinerary when I booked it with Mike was on an e-ticket but I then changed it after issue to be via CMB. That change was done by BA in the UK and they said that because CMB is involved, it had to be paper tickets.
However, I have just booked LHR to CMB via DOH on QR which is paper, and CMB to GLA via DXB on EK, which is e-ticket, so I am not sure how when the CMB involvement means paper!
But I do recall a recent posting here that if thngs go wrong, it is betetr to ahve paper as they can trace the reservaton more easily.