Engine 850: B5234T/2.3/20v/T5: Timing

[stevepcar]

Decided to tackle the timing belt change. Got proper Volvo belt & new tensioner. Checked timing was correct before I took the old belt off & highlighted cam sprockets' timing marks & crankshaft notch. I have tried about 20-times to get the new belt on in the correct position, but when I stretch it between the 2-cam sprockets it is always 1/2 a tooth out when the timing marks are properly aligned. If I do get the belt teeth to match the sprockets, then I do not have enough slack to get it over the tensioner pulley. I have tried taking the tensioner out getting the belt on & then putting the tensioner back on, but there is insufficient slack in the belt to get the tensioner back in place. I have followed the method in the Forum's articles section, I have tried following the Haynes manual method, I have tried Robert's DIY method on You Tube & looked at the FCP method, but he uses a tool to lock the cam sprockets. Anybody any useful tips on how to get this right please?