Oooh, how exciting for you. Our English Angora was only about 700grams when he was 8 weeks old (all fluff) and we had a cat litter box for him. But being angora, the litter was getting caught up in his fur – as were some of his poops at times. He had to be neutered this week – so I ordered a corner style litter box with a litter screen as I was conscious of keeping his undercarriage clean and dry and clear of litter.
It’s fabulous and he’s taken to it like a fish to water. He now sleeps on top of it (didn’t do this previously with his cat litter box) and I’m not worried about it since nothing attaches to him – and as he’s not sleeping directly in litter (or hay) he doesn’t smell at all. I purchased the jumbo size tray as Teddy is now over 2 kilos (5 months old) and still growing. The high back on the tray has also stopped his wee from going over the side. He’s always been great at using the litter box but clearly didn’t realise how big his bum was getting
and it was often hanging over the side of the traditional tray 
I wish I’d gotten this style of tray earlier now – I would have greatly saved on paper towels and vinegar! Enjoy your new bunny.