I'm putting up a B&Q aluminium + glass greenhouse, have got to the glazing stage and am finding it a bit intimidating. I've figured how the spring clips go in the frame but they're pretty tight and i'm kinda scared to exert too much force on the glass in case it shatters. I titted around for 15 mins and then chickened out, hoping there might be some how-to videos on youtube, no luck. I'm going to get a suction pad thingie to make handling the glass easier... any tips on actual technique when it comes to slotting a pane in behind the clips? ta