Plymouth Argaum had victory snatched from them with the last kick of the game to leave honours even at Weston Mill, in a pulsating finish to a match that had never previously hit the heights.
ARGAUM suffered a heavy defeat for the second week running.
They found themselves behind from a Ryan Tunnicliffe penalty.
Centre Phillip Ingleson went over for the Old Boys who piled on the points in the first quarter.
Number eight Sean Bedford-Smith claimed a try before second row Dan Shepherd grounded from a catch and drive.
Ingleson dotted down his second and second row Nick Dorian was rewarded for his display with Tech's last try of the half.
The Old Boys dominated the line-outs and used the catch and drive well to keep their backs supplied.
The Chiefs defended well after the break and contained Techs to a solitary try through flanker Neil Williams, crowning a good performance.
THE Chiefs' lack of front row was bettered by the experienced pack of the Old Technicians at Roborough.
ARGAUM chose to make their league fixture a double-header and put the additional Lockie Cup fixture into their match with Old Technicians.