I'd also recommend taking a look at ptownsubbie's tube-in molds. They may seem a bit pricey but they are well worth it to me because of how much casting I do of the same kits and how easy they are to use. The advantage of using the ones from Signature is that you can cast any size pen tube you want.Very nice !!!! . I like your work !!! . Looks like you bought the vertical casting equipment from Signature. . I am contemplating the same for my initiation into casting.