Silly question about the dizzy

[dnb]

I took the dizzy apart the other day, and dropped the drive gear so now I don't know which way it fits on... Car is a Serp 500.

Which way up does the gear at the bottom go on?
Short bit at the top or the bottom?

Thanks!

[David H]

Here's a pic of my pre-serp dizzy, hope it helps

[dnb]

Thanks. Looks like it's got the small bit at the top.