Any how-to install a CT into a BD?

Interested if anyone has ever added their own cum tube to a BD toy and how they did, or if there are links to tutorials on how?
It seems easy, buuuuut I don't know much about silicone! Would love to add to one of my toys.

 

Alas, no. It has to be made that way when the silicone is poured. I suppose, with enough dedication, patience, and skill, one might be able to bore a hole in the silicone without tearing it (but I would not recommend it). Small holes are very difficult to make in silicone, as it must be cut like a knife as opposed to a drill.

 

I did something similar years back by sharpening a firm plastic straw and pushing it thru a cheap jelly dildo. It wasn't the prettiest, but it let me try out a CT. Silicone is more difficult, as explained above, you'd almost need a large piercing needle or some form of laser cut to get a smooth edge that wouldn't tear. Save the diy for the stuff you don't care for in case it gets trashed