Do both. Most gunsmiths charge about $150 to skim coat and only slightly more to add the pillars. Also, if you just skim coat the rifle and it won't shoot the way you want it leaves you wondering should I add pillars? why go through that when you can have it all done at one time and be done with it.
$225 seems high to me. Maybe there's more cost because the A-5 is fiberglass. Not sure. I can tell you that I paid $175 to have a laminated stock pillar and skim bedded last year. Kevin Cram is building my next custom and he charges $175 also for pillar and skim bedding. Check out his pricelist at: