first let me say "welcome back!!" you were missed!!!
half even quarter pills may be needed to adjust your dosage. You must also steer clear of any protein within an hour and a half of sinemet dosing.
HAVE you tried a COMT inhibitor such as Tasmar or entolcapone? ( can't think of the name of it to save me!!)Stalevo??

IT might be time to either adjust your requip dosing or try one of the new ones.

two years since seeing your neuro (MDS I hope?) is unacceptable!
Your symptoms now are most-likely caused nearly equally from improper medication as they are from PD.
You need to get an appt with a movement disorder specialist and get your med protocol updated. Remembering back to my "meds days", I do not recall ever going more than 6 months without a meds ajustment.
Be very careful if you try Mirapex, the world just is not prepared for an OCD'ed Steffi!!!...LOL

CHarlie