I'm looking to get at least one set of Barn Doors ($49USD), a Snoot ($49USD) and the Gel Holder ($19USD). The Snoot and Gel Holder requires the UMF Mainframe ($55USD). Does anyone have any practical experience with them? These are mainly intended for portraiture. Should I be considering more than 1x set of Barn Doors? I have 3x WL monos and enough softboxes and grids for the 7" reflector at the moment...... well, maybe a grid for one of the softboxes. Opinions?