Welcome to YT!
To neuter a male is MUCH less invasive than spaying a female, so I would not worry. Since he is already over a year, he may be marking, and he may continue to do so after neuter, so you may want to look into belly bands. I don't have boys, so I guess that's about all the advice I can give.
__________________  The T.U.B. Pack! Toto, Uni, & Bindi
RIP Lord Scrappington Montgomery McLimpybottom aka El Lenguo the Handicapped Ninja 10-12-12 
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