We have a 310 Zodica Cadet RIB which fits in our 575 garage once about 50% deflated. You need to partly deflate the Williams JT and remove the steering wheel (has a quick release) it get it in the 575 garage. Personally I think the WJT is a waste of money because they have no space in them - max 3 people, are heavy and costs heaps $. If you want to go 40kn in your tender then they are great. Good luck with the 588.

Stupidly, I didn't arrange a factory tour during the 3 years that I over-wintered at Greifswald with my previous boat.  I understand that tours have not been available this year due to CV19 but please let me know if you hear otherwise.

All very exciting.

I looked at the price of the Williams tender ($22K at the time) and the stern gate option required for it (another $18K) and decided I could do better for a lot less.    The Williams is fun to be sure, but its small and heavy (something like 600lbs).  

Like Wayne and others,  I ended up with an AB 9.6 (about 10') aluminum RIB.   The aluminum makes it a lot lighter.   Its only about 105lbs with the bow locker and a level floor/bilge (as opposed to a V bottom to stand on).  If you deflate the stern tubes a bit more you can probably get an 11.5' RIB in there.  

I designed a roller system based upon easily available trailer rollers and a couple of starboard rails for mounting.   A Hurley winch with a wireless remote pulls the RIB into the garage.     The only real custom work was to add a roller to the stern gate which I put on and take off to replace the $18,000 option from HANSE.  With only 105 lbs rather than 600 lbs there is really no need to reinforce the hydraulics or the gate further.   The material cost was less than US$800.00 with some custom steel work and installation costing me a few grand on top of that.   Far less than US$40,000.   Works fine.     Let me know if you are interested and I'll send you pictures via PM.

Oh.. and get the compressor for inflating the dinghy.  Its a very cost-effective option and you will be glad you have it.

I did all this in the US.  I found the after-factory stuff in Griefswald to be slow and expensive.  Better to get it where you can hold people accountable for the quality and watch the work being done.

We visited the factory twice.   Once in the fall when I was deciding whether I would buy a HANSE and wanted to check out the production quality/build process.   The second time when our boat was a week or so from being finished and I wanted to validate the build we ordered and check quality again.  I'd highly recommend it, but these aren't normal times.    Remember.. if your boat is finished at the factory in May it can take til August to get it to the US.  Unless you stay on top of them and keep pushing.

very good size and nice speed with a Yamaha 25hp

25hp on a 9' dinghy?   That must move pretty well...

the Highfield 380 cm. is 12,67’

perfect size motor 

I stand corrected...   At the time I bought my dinghy (a 9'6" AB Aluminum RIB) the highfield was its competition.   I drifted back to what I knew then...

And how do you manage to store thé engine in thé garage? Must Be heavy?

With the help of a davit (small crane, I am not sure about the english word) I lift it up to a plate fixed to the stern pulpit, normal position for an outboard.

I admit, not so smooth operation.

Some motors (like my YAMAHA 15HP) are not meant to be stored on their side in the garage.   Sea water can flow into the cylinders if not stored vertically and you get an expensive repair.   Some don't have this problem.

I use a Garhauer lift to move the motor around from a rail on the aft stern rail.   The only thing on the deck 99.9% of the time is the small ball upon which the lift mounts when you are using it.   The rest of the time it breaks down and goes in the cockpit locker.

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This works well for us.  

though mine is white painted alu.

and after some years it is today in very bad conditions, a lot of corrosion and the paint is detaching from the alu.

the stainless steel version looks very nice !