Feelings on release strategy/administration for Melanotan Peptides (MT-II and PT-141)?

My preference is a pure peptide.* Water soluble peptide hormones act and pass quickly.* Melanotan peptides are very durable, even in reconstituted form.* Control and timing are critical for results.* Lifestyle and the person is the most important.* Freedom to dose and cease use is important.* Side effect management would be a potential nightmare with long acting melanotropins(???)