New station Riga, Latvia

First thing - thank You all for approval of my construction!
OK, there's rough bill of materials for my station. Some parts I had as leftovers from other projects, some I found in my garage so for me it did not cost that much.
STS-6 (SBM-19) tubes, 2pcs - 40Eur
Hermetic case for tubes - 7Eur
Rugged hermetic case for controller and Raspberry Pi - 20Eur
Boost convertor parts - 15Eur
Raspberry Pi model B embedded computer - 40Eur
SHT-25 temperature and humidity sensor with homemade temperature shield - 10Eur

So overall price of materials is about 130Eur.

Schematics.
I used basic boost convertor solution. My station is supplied with 23 - 29V using Power Over Ethernet (PoE) from antenna control module that's located on the same roof. Converter is based on UC3842. In my schematics can be made few improvements. First, feedback could be simplified. It works great with current solution and voltage is really steady, but I think that it would work good with simpler solutions too. Second thing is that output impedance of sensor box is pretty large, it's about 5MOhm, so it might be sensitive to EMI interference. First three weeks of my station online there were no problems, but few days ago there were enormous peak that's most likely interference from lightning or some other things. I would recommend to use pulse amplifier transistor close to GM tubes and transmit to controller already low impedance pulses over shielded cable. If there will be more interference like this one, I think that I'll try to improve my solution.
My schematics are redrawn from sketch that I used when I made it, so it's as close as possible that I can give You now. Feel free to ask additional questions if interested.
EDIT: Seems that forum resized schematics and it's a bit unreadable, so You can get unresized image HERE .