You may be fine with all the pads and holes Tim, it's just one of my pet hates, annular rings too small.
I'm somewhat thinking of those that will be buying PCB's or using your files to etch their own PCB. Those that have done some PCB work will have no problem with your work I don't think, moreso those with limited experience taking on this as their first big project. If it's populated without mistake and zero components need to be reworked, then I don't see any problems.
After the effort I know you're putting into this I wouldn't want to see criticism of your efforts by those that have taken on something more complex than they should've.
It's a heap of work Tim, you and GK decide what the outcome should be.
Yeah, I agree with the hate for small annular rings! The diode pattern really needs bigger rings and it's something I forgot to go back and fix. (I copied the DipTrace pattern for the DO-31 package and simply changed the pad spacing without fixing the pad sizes.)
For C2, I had the pad/holes larger, but I felt they were too close together, so made them a bit smaller. In reality, they need to be 0.75/1.5, so I'll go back and fix that. (Lead diameter for the caps is 0.5 +-0.1, so after accounting for hole plating on a professional board, it really needs to be 0.75mm minimum.)
I went with 2mm caps for the 10uF parts as they're at least easy to obtain; 1.5mm is starting to be more common, but the pad spacing would have been absolutely tiny!
I'll make some changes tonight and post another picture of the pad/hole sizes for you guys. I want to do this right, so if 0.8 vs 0.75 will really make a difference, I don't mind going back and changing stuff I've already laid out. Like I said, if the extra 0.05mm isn't that big of a deal, my time could be spent elsewhere. I'll defer to you guys, the much more experienced DIY board makers, on that.
![Grin ;D](https://www.eevblog.com/forum/Smileys/default/xgrin.gif.pagespeed.ic.QVVz6XIT20.png)
I haven't hand etched and drilled a board in close to 20 years, so I appreciate all the advice and tips from everyone on making this home etchable. I should pickup some supplies and try to etch a few smaller TH boards myself, to get a feel for the process. (The last board I did, I was in my early teens and used a Sharpie and some of those rub down traces and holes, with an etching kit from Radio Shack!)
Edit: When I originally did the patterns, I did it with the intent that most people would buy a professionally made PCB (at $15 for two boards it seems like a bargain), however I made sure the holes were at least 20mil and optimally closer to 30mil, per one of your recommendations. I didn't think about having to change drill bit sizes, so I can see how having as many of the holes as possible one size would be advantageous.