yup been there done that,just the other day
![Grin ;D](http://www.primitivearcher.com/smf/Smileys/default/grin.gif)
i had real thin,3.75" long,1.5" preform
like you i had to try and get it thinner
i knew it was gonn a snap too,i was over center and knew it but i am stubborn and just kept leaning into my Ishi stick
now i have 2 small preforms that dont look so thin now