In 1972 my brother ordered a standard P-10 which rode beautifully. It had the standard finish, chrome on the lugs, tips, etc. Following his lead, I ordered a P-13 and asked for a custom size with no chrome (OK, in hindsight a mistake). That P-13 would not track straight. Hands off the bars, into the curb. Hands off the bars, into the curb. (Doctor, it hurts when I do this....) I had to get rid of the thing; it definitely tainted my belief in the quality of the marque.
FWIW
Les Himel
Chappaqua, NY