Revising a nixie tube clock project

[carbon dude oxide]

Hello i have recently been revising my first schematic for my nixie tube clock project to get rid of alot of silly problems such as the cr1220 holder was connected the wrong way so the battery had to be put in upside down ect. Picture of the rev 1 nixie tube clock :

I have finished revising it and have made many changes such as the battery holder and replacing the old 74141 nixie driver to a cmos 4028 with high voltage npn transistors as the 74141 was very prone to ESD.

The circuit is based off of an arduino and i am now wanting to put a smt arduino onto the board (along with making everything else smt so i can fit a battery or two into the clock to make it portable.

In the top left of the schematic for rev 2.0.1 i have put a string of diodes in to drop the voltage before going i to the voltage regulator because due to the size of the case i am unable to fit a big enough heatsink into it (see the rev 1 photo)

This is my revised schematic 2.0.1 as i noticed a few problems In Rev 2 myself.

It would be very helpful if people could see any problems and let me know as i dont want to go to another revision after i have made this project again.