Not much difference, as the black spacer fills the gap between the outer aluminium \"face\" and the lower tensioning plate, up to the level of the top of the pillars, so the outer plate rests both on the pillars and the spacer. the plastic spacer has holes so that it sits at the same level with the top of the\"pillars\" which pass through it. The outer aluminium mount sits on the pillars and screws firmly onto them. Sorry I didn\'t take the picture of these stages, but I think these show it better than I could:
Not much difference, as the black spacer fills the gap between the outer aluminium \"face\" and the lower tensioning plate, up to the level of the top of the pillars, so the outer plate rests both on the pillars and the spacer. the plastic spacer has holes so that it sits at the same level with the top of the\"pillars\" which pass through it. The outer aluminium mount sits on the pillars and screws firmly onto them. Sorry I didn\'t take the picture of these stages, but I think these show it better than I could:
Not much difference, as the black spacer fills the gap between the outer aluminium \"face\" and the lower tensioning plate. the plastic spacer has holes so that it sits at the same level with the top of the\"pillars\" which pass through it. The outer aluminium mount sits on the pillars and screws firmly onto them. Sorry I didn\'t take the picture of these stages, but I think these show it better than I could:
