Hi Anji,I used to exchange emails with a BSA enthusiast in India called Joji, I think he lived in the Pune area. I wondered if you might have met him:
Not sure if you have resolved the problem yet, but I'd be inclined to "seal" the compressed plunger with what we call cable ties, or electrical ties. I'd use a few of them, keep the compressed assembly compressed, remove it, knowing it can't escape and "explode" on you. Then manage the "uncompressing" in your vice or similar.
Hi FidoCant recall meeting anybody by that name in Pune, Fido. Judging by the number on the bike, Jojis probably from Hyderabad. how long back was this. Have you been to India?Anji