Yes, it's true. 
The TSRs alone can lau bak sai heaps man.
We were briefed abt the impending test back then and followed by
some clips a few batches did. At first, the record timings of some
of the weapon handlings seems near impossible to break but with
much practice, it's do-able.
Of cos, must pre-select those arms which can be easily disassemble
and reassemble before the date of submission for inspection and
then for the tests thereafter.
The tankee guys really pei fu them.. must break tracks and assemble
them back in given time. the 40/50 oso no joke. If u are not
careful, there goes ur fingers.
