[Jon]

I've done it with, and without, a neck weight and with is much easier, but if you can't use it during your test it doesn't really pay to use it in training.

You might want to try and work out, or take a lesson from, the local Master's swimming club. They can help you out on your breast stroke and that will make it much easier- it's all about the technique.

The best thing you could do would be to get a buddy to spot you and work in the pool as much as possible- specificity is the key.

Jon