My Sigma Tek attitude indicator is going South and after one failed
attempt to overhaul it I'm not excited to sent it elsewhere and try
again. It looks like I can buy a new TSO RC Allen for about $100 more
than overhauling my Sigma Tek. Is there any reason this isn't a no
brainer? Why would anyone overhaul a Sigma Tek when they could just
get a new unit? Is the Sigma Tek somehow a better unit?

-Robert