Shared my experience of merging discovered map of Roextended 4.5 and vanilla map on 1.53 with all DLC. I'm not sure if it will be useful
Roextended 4.5 [1.53 only]
Re: Roextended 4.5 [1.53 only]

My PC: Ryzen 7 9700X, 32GB RAM, ASUS TUF Gaming X670E-PLUS, SAMSUNG 970 EVO Plus SSD 2TB, GeForce RTX 4060, Logitech G920
My Combo topic: https://roextended.ro/forum/viewtopic.php?f=15&t=1640