The problem with NO SPARSE LAYERS, is that it position dependent, and if your model is too big, it cannot be used, and the tool head would collide with it. For this part, it would/should have worked perfectly. Also, as others have suggested, try turning off the prime tower, and see what happens.
Unfortunately, I have found that behaviour on most support sites. I mwased up by loading TPU into my AMS and you would have thought I committed a crime. I have learned to take it with a grain of salt. Good luck on speeding things up.
You did commit a crime: you’ve told them what you did … you shouldn’t have… now you’ve been convicted…pending (whatever comes after that)… 
Listen, we are an EU island Country and have had a company run hands on for a good 40 years involved in all sorts of engineering machinery, materials, tooling and 400euro for this box promised by courier but supplied by a groupage container is daylight robbery.
Bringing one metric ton of steel from an EU country door to door delivery cost 150 euro. By comparison the H2D combo would have cost roughly 50-75 euro.
Bambu lab does not provide a service where one could collect their own goods! Their aim was to make money…
Drakko, did not have any intention of misguiding anybody. The 500euro came from memory and then I looked it up just in case to be sure hence my correction. It was 400 euro and by comparison since I was involved in logistics, it would-have cost me roughly 50-75 euro to be carried in the way it was dispatched. Nobody like getting screwed hopefully
In my country Malta, in the 50’s-70’s we had a prime minister Dom Mintoff. For some a hero and for some was not. Many years after his death I still remember his resistance to the introduction of computers and his argument was Rubbish IN and Rubbish OUT and that is exactly what Ai has become because it will search everything regarding a subject and present you with the wrong information. The internet is just a rubbish dump everybody posts this and that with a good portion of it being recycled or intently posted wrong to mislead. Watch U tube videos which go against perpetual motion and creating energy out of nothing…
This are the shipping costs today, it’s not they aren’t transparent about them.
The difference is incredible. For anybody who does not believe I still have the invoice!
I forgot to mention that I also paid €30 for a supplemental insurance on my shipment. And I sincerely hope the friendly guy from DPD got his fair share from what I paid for shipping, I don’t like to support slavery.
40 years and you didn’t get that shipping companies do lie and these things to save money. For analogue reason I did not let my box being handled by them rather than going to the warehouse with a van and pick it myself. Otherwise the hydraulic lift truck and two men were just a man and a normal van.
Then you should also know that prices for islands, mountain peaks are like that. Sending stuff in uk also cost more it’s always been like that.
What does the shipping companies do is past and over the sender, if you feel scammed by your local shipping company it’s on to them 
Guys sometimes I am also too fast to write instead to read with comprehension but you beat me to that with miles. Either you can not understand what he said or you are just generating text. And not only here but seems like in most topics we have 2-3-4 guys just writing something, then pretend that newcomer need to be more gentle with their souls …
Please first read well then reply. And no just to one word or one sentence out of context, but having in mind the whole conversation.
Go go cincinaty go, down vote people because their mature language is not English? What a unbelievable value for the community and the Bambu brand! 