LM2596 replacement

Hello!

First of all, thank You for this wonderful project. I have planning to build a nixie clock in the past 3 years and seems this is the project with finally I can finish it. As I had almost every detail at home, I ordered only the PCB v6. But one of the things is missing the LM2596 and not available here in Hungary. Is it possible to replace LM2596 with LM2576 ?

As per schematic and characteric for me seems that it is ok, but I would need to change the followings :
- L2 to 100 uH (instead of 33uH)
- C9 to 1000 uF (instead of 220 uF)

But, I do not fully understand the circuits though...
Could you please advise if I am will be right with these changes?

I have attached the pictures of typical applications of both lm2596 and lm2576 from the datasheets.

Thank you in advance.