5 string bridge issues

[Beer of the Bass]

I bought one of these bridges on eBay to use on a 5 string I am building.
[url="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=200258838414&ssPageName=STRK:MEWNX:IT"]5 string bass bridge[/url]
I tried to string it up today and discovered that the holes in the back of the bridge are too small for the last inch or so of my B-string to pass through. This seems like very poor design. I'm using 45-130 gauge Dunlops, nothing outrageous. I doubt I'll be able to return the bridge as I bought it several weeks ago and have already posted feedback. I'm not really equipped to drill out the hole neatly as I don't have a pillar drill, though I guess I could have a go. Are there any other inexpensive, 17mm spaced 5-string bridges out there? I guess I'm just posting this as a heads-up really, as a 5-string bridge which can't handle a B-string is not much use to anyone.

[Ou7shined]

Is it really far out? Perhaps a round [url="http://www.ebay.co.uk/itm/10-PIECE-ASSORTED-NEEDLE-FILE-SET-SOFT-GRIP-HANDLES-/250648219622?pt=UK_Hand_Tools_Equipment&hash=item3a5bcc4fe6"]needle file[/url] would be able to open the hole up enough - these bridges are seldom made of toughened metal.

[Beer of the Bass]

I rummaged around in my drawers and found a tapered reamer to do the job, so at least I've got the string on now.