Short answer, nope. 
Even the HF filter HF160, which is recommended, means you have to take off the gear lever bracket to change it.
I, on recommendation from my (BMW) mechanic, use the HF 164 which is just short enough to allow you to change it without having the faff.

And I use a strap filter removal tool to loosen and tighten it.

So, short press = Beaker
Long press = Animal

Got it.   

Hi Glyn,
you're in luck. I replaced a motobatt recently and haven't gotten round to recycling the old one yet.

I have the two lugs taken off and can send them to you. Just DM me your address.
I have the two bolts that screw into the battery, and the two brass U pieces.

I'll throw them into an envelope as soon as i have your address.

There are two vertical channels down the back of the inner hard'ish foam liner which 'could' have been something to do with it...except that my old C3 has identical, perhaps even deeper channels and I am sure they are exhaust channels for the warmed air coming in the front and top and passing over your head to keep you cool.

I just had a look at my C3 pro, as I know it has the antenna built in. I don't use it as I installed a Cardo.
I would have donated it to the cause, but unfortunately it is installed between the outer shell and the hard foam/ABS. The last tail of it comes out and terminates in the connector plug. It isn't removeable.
So my guess is they stopped installing them when they discontinued the comms.

Had a similar problem. Had a Optimate 4   charger working off a SAE plug directly to the battery. I also had a camera connected to the battery, with it's trigger wire connected to the accessory/gps socket by the battery.. This relayed to the camera if the bike was on, and supplied 5v power to the camera.

For sh^ts and giggles, changed the optimate to canbus mode and plugged it into the accessory socket at the gearlever. This also, for some reason, kept power going to the accessory/gps wire and hence the camera never turned off.

Solution, going back to direct connection for the charger.

And i think you might be right, the relay is causing a draw or load which the charger doesn't like.

Just one thing to note, if it is important to you.  These are road legal in the UK (as stated in their ads) , but are not EU stamped, so if you go to Europe, it may cause a problem.

I purchased professional initially, but had to upgrade to Ultimate in order to code a new TPMS monitor.  The difference between buying ultimate initially, or upgrading from professional wasn't that much.

I had a look at the website and, as you probably know, it doesn't show ABS cycling specifically.  As Richtea said, give them a shout, they do answer.

Another option, is if you are going for a spin any time soon, like next weekend, I could meet you in Waterford and bring my motoscan to do it on the spot.  Provided it is safe to do so.