Dear Clemente,

we are using glass buckets too. Last week I exchanged some Isocarb
experiences with Howie Spero and got a remcommention to use metal buckets,
because glass ones tend to float sometimes. Nice way to avoid trouble with
memory effects due to floating buckets.

Indeed, the stepper motor is not my favourite part of the Isocarb too. The
trouble occurs mainly when dust from samples or grease from H3PO4-bubbles
are present. 

Anyway cheers to Paul Hanson. He improved our facilities as well during the
times I had a employment in Lab at Juelich.