This is what I do to some of the problem Angels. I take a 2.5" pot, put some cutting mix in the bottom, then place a 1.5" pot in the middle and fill in around the sides with the mixture, firming as I go. Any compost that gets in the middle pot is emptied out. Place the cuttings in between the 2 pots, firming in around each one. As you can see in the photo this works well as all are rooted. I removed a cutting so the inner pot could be seen.
Rather than throw these miniatures away as they had become woody, I thought I would try my hand at making them into Bonsai. The photos of Wensum & East Sussex were taken a day after they were potted up on 24.09.09, so I have my fingers crossed that they will be OK and make new roots. As you can imagine I had to remove so much of the old root ball to get them into Bonsai pots.
Cardington was done at the same time, and has settled in and started to flower in July.