Homebrew PCBs

> Adam wrote:
> <SNIP>
> I use alkaline ammonia chloride etchant because
> I etch with electroplated tin as the etch
> resists, and all acid etchants attack tin. 
> This etchant is very rare among hobbyists
> because it really needs spray etcher or sealed
> chamber to operate due to ammonia fumes. It
> also needs complicated chemical analysis to
> make sure it stays working.
>

Adam, have you dropped the CuCl in favour of
the alkaline etchant because of problems with
through hole plating ?

Is the whole tent and etch thing problematic?