Two questions concerning ossias

[Nick Payne]

This ossia just extends for part of a bar:

<< { g'32_( fis) e_( fis) }
        \new Staff \with {
            alignAboveContext = #"guitar"
            fontSize = #-4
            \override StaffSymbol #'staff-space = #(magstep -4)
            \override StaffSymbol #'thickness = #(magstep -4)
            \remove "Time_signature_engraver"
            explicitKeySignatureVisibility = #end-of-line-invisible
        }
        {
            \key g \major
            \clef "treble_8"
            \stemUp \slurDown
            { \times 4/5 { fis32( g fis) e( fis) } }
        } >>

1. How can I move the ossia stave up slightly so that it isn't 
contacting the beam of the 32nd notes in the main stave?

2. Is it possible to put a vertical dotted/dashed line at the beginning 
of the ossia from the bottom of the main stave to the top of the ossia 
stave?

Nick

ossia.png
Description: PNG image