But I cannot send a message to you :S Although it seems you could take unaspirated consonants(ㄲ, ㄸ, ㅃ, ㅆ, ㅉ) that way in that case you described, the difference between「っ」and those consonants does exist. 「っ」gets one beat, and the letter before「っ」is supposed to be pronounced with a strong accent. In Korean, "p" of "oppa" has no beat and 오빠 is pronounced "opPA".