Agreed that the JB is functionally superior, and durable to boot; we always used one for the shop pump. There's nothing rational about using a Silca in this day and age, but we've been through a lot together. When the present leather seal wears out, I may be tempted to update, but it will be with a touch of sadness.I use a Topeak Joe Blow and it is SPECTACULAR. If you get one you will not regret it...