I've been using the standard BTTB with very good results for almost 2 months. I typically use Rollei Superpan 200 and have a dev time of 4m15s in each bath. I recently shot a roll in some pretty harsh light and it had very blown highlights which got me thinking about N- and N+ development with BTTB. My question is do i need to adjust my developing time with the N- or N+ recipes he suggested. I have search online and have read in several places that time isn't a major concern with this developer. However i haven't read anything that gives much information about the + & - development (including his website). Can anyone shed some light on this? Thanks in advance.