One point regarding changing out the trigger. If you can operate a large flat blade screw driver to remove the barreled action from the stock, and then successfully operate a small flat blade screw driver to remove then factory trigger and install a new Timney replacement trigger. You might be able to handle the job.
You will have to relieve the stock a little for a clearance for timney safety to operate correctly.
My Vangaurd is in 257 WBY Mag.