After some ummmm-ing and ahhhhhhh-ing, I've elected to mount all the resistors, caps, and power diodes on some tag boards with solder-tags on two sides of the boards, rather than wire it all up point-to-point style, so I'll need to order some suitable tag boards from Evatco along with all the other needed components, I'm still debating in my head what I'm going to use as the chassis for my OTL Headphone Amp build, once I've got everything worked out and all the needed parts, I'll start the build-process and will be doing a write-up as I go along, will also include some photos as well.
I've just finished drawing some layouts for the tagboards which will be used to mount the components.
Evatco sell two different types of tag boards I could use to mount all the resistors, caps, and power diodes on, one of them is a dark brown phenolic 36-way tag board with two rows of 18 tags, it looks like this: