here the translation of the russian part:
Why build? Today I am conducting some tests with replacing an external LNB source or internally replacing an XTAL and giving an external signal. In any case, I use 6 types or different LNB modes, such as STRONG R739, Octagon OSLO 1609 and others. In the end, another big question is why the same RDA3566 processor used in different (all) models does not use load capacitors and does not work with an external source? it is after each experiment - XTAL is still inside or deleted, etc.