Brad,
Sounds like you didn't get instructions on what fuse and our recommendation of cannonfuse.com. as a source for 1.8 mm fuse. We have been under the impression that 1/16 fuse was no longer available. We have been drilling an .093 fuse hole in the small barrels to accommodate the 1.8MM, (.071). Somewhere on this sight are night pics of "twin barrels" one with 1/8 vent and one with 1/16 at detonation. Incredible difference. Next day we changed to 1/16 til (I thought) it was no longer available.
Now, with the 1.4MM (.03937X1.4) .055" diameter fuse, I will be looking at going back to 1/16 (.062") vent.
If you do not get good results with the tape, go ahead and drill out the fuse hole to 1/8" tonight. You will still get a pretty good report. I will ship another barrel tomorrow n/c in return for your comments on the difference between the two when they are loaded exactly the same. This way you can play tonight. I wouldn't want to hold up the fire dept. when they need me! Hell, someday I might catch my wife's garden on fire and need you guys!
Michael