Is there a maximum weld gap size in SW 2010?  I am modeling frames using an aluminum t-slotted profile system, and the corner plates are 15mm thick, so I'd like to be able to leave a 15mm weld gap to hold the space for the joining plate, allowing the cut list to be accurate - but 11mm or .440" seems to be as large as I can go.  If I specify a larger gap, SW ignores any gap setting.  Thanks.