I've always been intrigued by underhammers ever since I saw a H-A decades ago when I was boy. I would like to build one. Pecatonica River has a H-A style kit that I'm interested in. Has anyone built an underhammer from one of these kits? What is involved in building one? I know that the buttstock is drilled for the through bolt and basically inletted. How much wood removal is required to finish shaping the stock? I guess what I'm asking is, is the buttstock and fore-end in the white or just crudely inletted and roughly shaped and the rest is up to me? I know dovetails will need to be cut for the sights. I know the breechplug will need to be fitted. The location for the nipple will need to be spotted and drilled and tapped. How does the fore-end attach? How does the ramrod thimble attach? I also have heard that these H-A actions are not that durable. The half cock and full cock notches tend to chip out. Can anything be done to avoid this and can spare parts be purchased without having to purchase an entire new action? Thanks in advance for any information on this.