Just replaced front rotors on sliding calipers (W124). Do the "self-securing" caliper bolts need to be replaced or locktited? I coated with anti-seize and torqued to spec (81 ft-lbs). Am I OK?

Also, one rear piston was a little difficult to force back into the bore but I was able to get it in with extra effort? Do I need rebuild/replacement or will it be alright? I did replace fluid.

All assistance appreciated.

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2008 GL320CDI 6K
1970 280SL 112K
1982 240D 210K (Sold)
1973 220D 220K (Sold)
1967 200D 160K (Sold)
1992 400E 139K (Sold)
1988 300E 148K (Sold)
1987 300D 257K (Sold)
1991 300E 108K (Sold)
1987 300E 131K (Sold)
1978 300D TMU (Sold)
1980 300D TMU (Sold)
MBCA Member