Ian

Should be right, but just didn't want you getting to that stage and find they had slipped through.
I have 3mm tube on them and recommend you use that too. Depends what valve you use, on the JT valve, I think the larger volume tube allows the air to decelerate after leaving the valve and people struggle to get the gear away with the outward angled leg doors and fast forward flight. I've never had a problem on mine, or people using the UP2 valve.
I use a philips screw driver of around 1/8 dia and with a little "spit" force that in the tube end as far as I can, I leave it 1 minute, pull out the driver and work the tube on. Works for me on Festo and BVM tube.

Dave