You can use 70 cm mast or 80 . But its difficult more unstable
Sure you can Jump with short but Need to Be a Better rider than a beginner.learn short and go long quick.when good rider go back short if Needed
Aren't board shorts over wetsuits for 'men' who are insecure about their manhood? Exactly....and in Summer too , if u are not insecure u have to wear spedoos . Spedoos are more light and legs are more free to move.. Dont wear boardshorts over wetsuit .Better have bums damage wetsuit than look kooky...