Alright Triggerman, I think you've got the CZ situation pretty well figured out (you've done your research). The yodave kit includes trigger springs, since many here recommend it then you say you haven't seen much talk of trigger springs, just clarifying that for you. It has 4 springs from very light to heavy so you can tune your trigger just the way you like. A 10 oz trigger is about the practical low limit, and I'm sure that's what SUPER TENERE meant to say, a simple typo. I also have the Mr. Fly trigger and depending on tolerances, 3-4 oz is the practical low for that guy, so a factory trigger ain't goin down to 1 oz no matter what, you wouldn't be able to close the bolt and have the trigger set, it wouldn't hold the striker back.
It kinda depends on how far you want to go with the rifle and what your shooting goals are with it, as far as the other mods go. I pillar and bed nearly all my rifles as a matter of standard practice, and whether this results in improvement in a rifle that already has a well inletted stock is debatable, but once it's done it's no longer a question mark if you're leaving any accuracy on the table by not bedding. I kinda enjoy the work so it's a simple decision for me, if I didn't have the skills and had to pay someone else then I'd think twice about doing it for an otherwise factory spec rifle.
When people add all the other goodies to their CZ (like DIP trigger guard, magwell, hex bolts, etc) they're
usually doing that in conjunction with a custom barrel. CZ is a great platform to custom build off of, and very fun if you are DIY inclined. My next project (that has been nearly a year in the making) is with a Boyds Pro-Varmint stock with adjustable comb. I've pillared it, reinforced the fore end (threaded rod epoxied into the inletting), got Mr. Fly trigger, hex head bolts,
reduced power striker spring (these things are oversprung for .22 LR) and will be modding the striker tip. My gunsmith in the States says the barrel will be shipping this week so I can expect around 2 months wait now for the import process, and once received it will be index tested before glue in to the receiver, and finally I will bed it when the barrel is installed.
Here's the pillar/bedding I did for my Full Stock, and if you want to see how it shoots head over to RFC and Czech out the standings from the last few 100 yard monthly challenges.
And yes, I'd just like to reiterate that CZ are a lottery, big time. I got one good one out of 4. What I see is that they take no quality control measures to prevent poorly machined crowns and chambers from going out into circulation. You would be wise to inspect a prospective rifle before purchase, I realize that's not always possible (I had to order the Full Stock I wanted from another province), but when it comes to this brand, ya really gotta "Cover your rear" before you buy. I support Terry_g's findings about the crowns. This is inexcusable in a rifle of this cost.
