Update on the Silicone Straw method. This is working great and is easy to make. I cut a straw (5mm dia) to 18mm in length. Put some GE 100% Silicone Sealant in one end about 2mm or 1/8' deep. Smeared some around the outside of the straw at the atty end. Let it dry ..............Take a safety pin and poke several holes in the end. Cut a couple of "V"'s in the other end of the straw. Fill up the cart and slide the whole thing in, gently squeezing the end to an oval shape so that it seats all the way in.
This is working very well BUT, I still have to see if it empties the cart and also how easy/hard it is to refill. Also I need to see how durable this is. Other methods being discussed here look like they would last longer.
Updates at 6.
Update on making a miniature version of the cart cap that would rest on the ledges and not need a straw. Well I just learned a valuable lesson. Even though it LOOKS like it's cured, it's not cured in the middle of the mold! I ruined it so I'm starting over on this. I'm now baking it to see if it will cure more quickly.
This is working very well BUT, I still have to see if it empties the cart and also how easy/hard it is to refill. Also I need to see how durable this is. Other methods being discussed here look like they would last longer.
Updates at 6.
Update on making a miniature version of the cart cap that would rest on the ledges and not need a straw. Well I just learned a valuable lesson. Even though it LOOKS like it's cured, it's not cured in the middle of the mold! I ruined it so I'm starting over on this. I'm now baking it to see if it will cure more quickly.
