that photo is just from hydro marine's website. i assume it's the smallest and largest lehner they carry.

the little one is just so....cute...lol.

I guess I have to answer my own question!

The plugs are 5.5mm long

I got my 1930/8 in the mail at the office today. Man, I feel sick, I think I need to leave work early!

Yeah, you don't look so well. I think you need to go home early and "rest". :)