You can get the model by joining the XenoBits Discord group via the link. There is a hidden channel called "io-butovs-bits-box", and that’s where the link to the free biotitan will be.

To gain access to the channel, you need to do the following, I quote:

"have to be approved first, to do that post a mini in the showroom and @ mod and one of us will approve you"
Discord:  https://discord.gg/QzpKYHbDtZ 
model without supports