sorry I only do N-scale.
I created these models for myself and I sell them with no profit just to help my own Italian N-scale community.
In principle I could rescale the N model of 4/3 and get TT, however this would not take advantage of the larger scale and the possibility of rendering more details (e.g. bolts, chains, tap wheel). Also the texellation of surfaces, which is invisible in N scale, may become an issue on the larger scale.
As I do not need TT models myself I will not spend the effort to add these details.