By the 1970s VT machines had got a little smaller, so the mobile installations became a little less cramped.

A VR200 installation	An AVR2 in LPU 1
Razor blade editing was still the way to go. Roger White cutting on mobile VR2000 .	The AVR2s required a different jig to hold the splicer, but at least they were kinder replaying splices! John Wilson edits at what looks like a table tennis tournament.
Life was terribly hard for the VT guys on the road....... The caption explains it all!