Aviva group personal pension to SIPP

Aylesbury_Duck

I've been doing some research into my Aviva pension, a former Friends Provident policy that's been deferred since 2014.  It's done rather well, particularly since I invested the bulk of it in international and UK equities in summer 2000, and is worth about £185k, about £20k of which is in with-profits and which generates an annual bonus.  I've just de-risked the equity funds into different funds (c.55% equities) because I am likely to begin drawing on this plan in five years' time (at 57).  It represents about a third of my DC pots and I have DB pensions currently worth about £18k p.a. kicking in at 67.

I'm paying a 1.00% management charge on the non with-profits elements, and know that I could save a reasonable sum by moving it to a SIPP.  I'm happy to stay with Aviva for now, partly to make the transfer easier (I hope!) and I've had written confirmation that there is currently no MVR to be applied and nor are there any protected benefits to my current plan.

What's the best way to progress here?  Open a SIPP with Aviva, citing the current Aviva plan as the one I want to transfer in?  Is it that simple?  The email they sent me, while otherwise helpful, wasn't clear because it talked about a "different division" handling the process.  The last two times I've managed to speak to them on the phone it's been the case that the agent doesn’t really know much beyond very basic principles and general queries.

I'm not eligible for any of their gift card promotions because it's an Aviva-to-Aviva transfer.  I suppose one advantage of transferring to a SIPP elsewhere is to take advantage of a similar incentive, assuming all other things (fees, decency of platform website, customer service, etc) are similar.  I have this (perhaps naive) assumption that an internal transfer should be more straightforward than moving between pension providers.

Anything else I should be considering at this stage?