1. No use the same line length it wont matter much, unless you want to get super picky at doing certain tricks. Just concentrate on your wave riding for now.

2. lines will last ages as long as you look after them, check them for any signs of damage, a little nick in the line will mean it could snap when jumping so watch out.

3. I would say you'd be right with the 9m (but thats a guess cuz i know nothing about you.)

Pat01

Two seasons in and its time to prepare for round three. Should probably know a lot of this already but...

Just try whatever man. You'll know if you'll like it or not. You can't really make a mistake as such. Its all fun. You won't really know what's best for you until you give it all a go.

Hey Pat01,

I am 90kg and I use a 9m and 20knots above I use a 7m and I am no pro - coming onto my 4th season I think. 9m mostly on 20m lines and 7m 24m lines.

I think also if you are going strapped you would most likely need a bit more power as the strap for the back foot is fairly far back and will cause you to bog a bit.

Also one thing I noticed especially with new guys on a surfboard is they put too much weight on the back foot, fine on a TT but not a SB, all the bouyancy/plaining area is in the middle of the board. Put alot more on the front.

I have not used my TT in 2+ seasons.

Like Smedg said, Just go for it!

Good luck, you'll love it.
Rich