Rollover tax considerations for PM IRAs - what am I missing?

• •Okay, so I've been doing my due diligence on rolling over a chunk of my 401k into a Precious Metals IRA, specifically looking at platinum.
• •My traditional 401k is with Fidelity, and I’m eyeing a self-directed IRA custodian that deals in physical platinum.
• •My primary goal here is diversification and hedging against the insane market volatility we've been seeing.

Okay, so I've been doing my due diligence on rolling over a chunk of my 401k into a Precious Metals IRA, specifically looking at platinum. I’ve heard plenty of horror stories about people getting hit with unexpected tax bills or penalties during rollovers, and frankly, at my stage with a portfolio of around $750k, I really can't afford any rookie mistakes.

My traditional 401k is with Fidelity, and I’m eyeing a self-directed IRA custodian that deals in physical platinum. My primary goal here is diversification and hedging against the insane market volatility we've been seeing. As a tech entrepreneur here in Austin, my growth funds are usually doing pretty well, but I’m looking to de-risk a portion of my retirement savings. Platinum feels like a solid choice right now, with industrial demand and limited supply. It's not just about gold and silver anymore, right?

I’m pretty clear on the direct rollover process – trustee-to-trustee, no money in my hands, avoids the 60-day rule and the potential 20% withholding. But what about the less obvious gotchas? Are there any specific tax considerations for platinum that differ from gold or silver that I should be aware of? I’m thinking about things like purity requirements, specific IRS definitions for what's considered investment-grade platinum, or any obscure P.S.A.s (Precious Metals Storage Accounts) that might trigger tax events I haven’t even considered. Also, any thoughts on custodian fees and their impact on the net return after taxes?

Anyone here with experience rolling over into a platinum IRA specifically? What was your experience with tax reporting, especially if you had to deal with multiple custodians? Any recommended tax advisors in Texas (or virtually) who specialize in precious metals IRAs, or should I just stick with my current financial planner and make sure they’re up-to-speed?