About B@ss Home Page...

Hello, i´m wonder if anyone know how could i contact with the creator of that page, because i´m interested in comment one HB-F9s ram mod published in that page, refered to X5 circuit. I tried diagram of the page but i didnt get good results, works with 512K but i have problems with some keys in msx keyboard ,after the mod some keys dont work.
This is the page:

www.basshp.msxall.com/HBF9S.html

In the link seems like the X5 circuit belong to Carlos Maidana, please if anyone knows how can i contact him or B@ss let me know.

Thanks you.