I use CHS and have not had pinholes. I note that the last posting on the subject a few days ago showed the user had not pre-soaked as recommended or used water as stop as recommended. That is the likely source of the problem in that case. Please keep making it the way you do.
I think individuals who have an issue should deal directly with photoimpex, but I for one appreciate the opportunity to voice my support for what you do and how you are doing it...Kal