Hi guys, fairly new to Bass, thought I'd give it a go after 20 years of guitar! Just setting up the Fender Jazz bass CIJ I just bought. There is a slight bow in the neck. I know this can be normal and this certainly isn't excessive but normally I like to have the neck fairly straight. (I have plenty of experience setting up six string guitars). Is it ok to tighten the truss rod to get the neck straighter or is it normal for a bass having the heavier strings to have a slight curve?