A C-90 overhaul question

[De rode ridder]

Hi. I have a C-90 -8 with corroded cylinders. It has only 300 hours SMOH and I was wondering if one can remove corrosion by resizing?
It is either buy 4 brand new cylinders or do some work... Any idea about the prices? I believe a new millennium cylinder is 900$ a piece versus???
I am located in Europe and we use different rules but should I go for N-register, are you allowed to do work yourself on the engine or is that reserved to the A&P's?View attachment ImageUploadedByJ3 Cub1431196498.934886.jpg

 

[bob turner]

 

[De rode ridder]

 

[De rode ridder]

 

[Cub@H20]

 

[bob turner]

 

[De rode ridder]

 

[Renkou1]

 

[bob turner]

 

[De rode ridder]