I see no reason to place IC1 at 45 degrees.
If you straighten in up the connections to the USB and XTAL will be simplified.
I agree with moving the ISP to the left of the XTAL.

 

Thanks for the extra feedback, I have already created a couple of nodes base don this and sent them off to the fab house. Hopefully they work :-S

These are just prototypes of the concept so not the final design, once I have verified that they are all working as expected I will be removing the reset button, power led, PE6 led, and ISP header (move it to a surface contact only).

This should reduce the boards height by around 8mm so I can get it to around 15mm high and 50mm long.

Attached is the image of the copper layer sent to be produced, it has 4 boards panellised on it each with its own function. Actual size is around 23mm high and 50mm long each.

Next to get a solder stencil made up to help with the hand production :-D

I will post back with progress when the boards come and when they get assembled.

Cheers,
Dean

 

Wel the boards came much quicker than I thought so now I am twiddling my thumbs waiting for components.

I am very happy with how the boards turned out, just have to keep fingers crossed to see if they work :-S

Attached is a photo of the boards, phone camera so the colours are off a bit but the board is bright white and not the light blue from the pic.

 

Thanks for the update.

Let's hope it works out the way you want.

Which board house did you use?