Dist. Ct. did not abuse its discretion in sentencing defendant to 30-month term of incarceration, after finding that defendant had violated terms of supervised release that included defendant’s participation in domestic battery, even though defendant argued that Dist. Ct. based length of term of incarceration on fact that defendant’s 35-year sentence on underlying drug conviction had been reduced to 20-year sentence due to retroactive amendments to sentencing guidelines. While Dist. Ct. believed that upward departure on guideline for revocation of supervised release was permissible under Note 4 to section 7B1.4, Note 4 was not applicable because original sentence involved no downward departure or charge reduction. However, instant error was subject to plain error standard due to defendant’s failure to object to Dist. Ct.’s reference to Note 4. Moreover, said error was harmless, where Dist. Ct. selected 30-month sentence by applying section 3553(a) factors that included nature and circumstances of defendant’s supervised release violations and his violent assault of his former girlfriend.