sonic frontier sft-1 transport ,mods.

just purchased a used sonic frontier sft-1 transport,Does anyone knows about any modification for this transport,or any recomendation of who should I'contact?,sounds good,but I'think coud improve,as far as focus and digital edge; any info would be greatly apreciated;thanks:
Parts Connection:
Chris Johnson at Parts Connexion.Please report back with what mods you decide and price,I got the same transport.