Yeah was hard for me to tell also. I think you got enough spark, I'd try to see if they're being well directed to the pan. You having flash in pan issues or failure to fire main charge?
I don't have experience putting one together but have seen the components of the pistol kit first hand and it is top notch. Also top notch folks to deal with.
I finished a walnut stocked NWT gun with Fiebings light brown leather dye and then Bullseye shellac. It was suggested to me by @Rob M. who makes some great trade guns. The leather dye gave the walnut a nice reddish tint. The shellac held up great hunting in the rain. He told me the shellac is...
I've stored powder in the brass flasks for long periods with no problems. I use a small funnel when I need to fill anything with a small hole from the original can.