Abstract: An edge tape modifying device for trailing an edge tape applicator (1) which applies an edge tape to the edge of a contoured panel (3) of a predetermined thickness by means of a pressure roller (4) which is pressed against the edge of said panel (3) and is displaced there along by means to move said pressure roller (4) and wherein simultaneously an edge tape (8), is advanced to engage against the edge of said panel by being pressed there against by said pressure roller (4) as said edge applicator advances about at least part of the perimeter of said panel, characterised in that said modifying device includes a swing arm (21) pivotally dependent from tape applicator to be able to articulate relative thereto, said swing arm (21) biased about said pivot for contact with the edge of the panel when in use, said modifying device including a modifying means (26) supported by said swing arm (21) away from said edge tape applicator, said modifying means (26) biased towards yet guided for movement relative to the edge