The books have not arrived yet. The itch to get started is now a rash, is that why we sometimes make rash decisions? I am edging closer to the Jim Chambers models in kit form. Drilling exact holes in both metal and wood is a tedious and exacting skill but can be done with care. Fitting parts to shape is also tedious but not scary. Marking and drilling that inlet hole should take time. Fitting metal to wood and shaving the wood to mate well will take time. All in all I'm going to make a decision soon and will let you know which rifle I choose. I don't have my eye glasses on so I hope there aren/t too many mistakes.
Ifin yer set on a Chambers Kit, I'd get off the keyboard and pick up the phone and get yer name on their list. Depending on what model rifle/kit you may wish to build I was advised by them just recently that there is a 2-8 month wait. Due mostly to China Flu influencing wood availability for stocks and some other parts here and there and a nasty storm of some sort that hit the area last year that also affected proper wood availability. Can't say about most of others, although I see on their websites that certain items in kits are out of stock. Kibler in the last few days advised me up to 4-5 weeks.
Then unless you have a good source for lead balls, what ever caliber you may want and you plan to buy a mold to do your own casting (unless also you already have or know where you can readily obtain), start looking now. All of the major online outfits and then some I've checked on are out of stock, even Lee Reloading has on its website 'not available'! In doing as you are doing right now, I'm looking at building a flint rifle. Checking here on this forum, a few others, asking around, and reading. I shoot and cast balls for around a dozen cap and ball revolvers. plus conversions, T/C percussion rifle, all black powder shootin. Not to forget seven calibers of modern handguns (revolver/pistol) and 8 calibers of rifles dating from 1902 plus (bolt, lever, semi-auto) that I shoot and cast for. I've Lee, Lyman, RCBS, and NOE molds. I use mostly Lee round ball molds for blackpowder, have for years and they along with others are about as obtainable as many other reloading components and ammo right now.
In anticipation of doing a build I have been tossing either a 36 or 40 caliber in the quest and looking at molds/ball diameters that could be used. As mentioned have been searching every outfit online for A-Z and all indicate 'Out of Stock' and some indicate 'No Backorder'. This isn't just for the 36/40 calibers, the whole line of calibers. Not just Lee, but all of them, including molds for firearms from the 1700's to present day. Was advised due to manufacturers shutting down due to the Chinese flu shutdowns of material suppliers and plants making. Mold makers are like ammo makers, playing catch-up with demand. Read of a guy buying a much sot after semiauto pistol that was a fairly new caliber in the shooting world. Finally bought the pistol, but now can't find any ammo. What is available is from scalpers and scammers at guns shows and gun broker. I did check Ebay--there are scalpers and scammers there that are selling new Lee roundball molds at $50-75 for some diameters up from the $19-25 normal price. Where they're getting them brings the question of where online primer, brass, etc scammers are getting the thousands of new reloading components they offer for $100 plus over retail. I have pleny to keep me shooting, won't get suckered by them.
OK, I've gotten windy, bad habit I have on the keyboard. FWIW---The only plumbing/fitting I've ever done is the home version and that has its limits. After high school did a stint in college to be a animal vet, but ended up spending 5 years in a packing house, 3 years construction, 21 years as a Police Officer, and 19 as a heavy equipment operator digging, pushing, and hauling dirt. Never had much to say about plumbers and fitters unless they didn't behave themselves or got in the way.