Draw text line with padding using Apache PDFBox

I have an existing pdf where I need to draw a fixed length text without calculating the position for each character. By introducing four spaces between each character I nearly get the desired result but it is still not perfect.

Q1: I am wondering how would you manage a scenario like this, if there are more intelligent ways to achieve the same result.

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

public class PdfWriteSample {
    public static void main(String[] args) throws IOException {

        try (InputStream is = PdfWriteSample.class.getResourceAsStream("/template/Mod_F24_Ordinario.pdf")) {
            PDDocument doc = PDDocument.load(is);
            PDPage firstPage = doc.getPage(0);
            PDFont pdfFont= PDType1Font.HELVETICA_BOLD;
            int fontSize = 8;

            try (PDPageContentStream contentStream = new PDPageContentStream(doc, firstPage, PDPageContentStream.AppendMode.APPEND,true,true)) {
                contentStream.setFont(pdfFont, fontSize);
                contentStream.beginText();
                contentStream.newLineAtOffset(120,724);
                String text = "ABCSKL72E12N408X".replaceAll(".(?!$)", "$0    ");
                contentStream.showText(text);
                contentStream.endText();
            }
            doc.save(new File("results/newF24.pdf"));
        }
    }
}

Q2: To continue drawing text in the next fields, should I go on like this or is there e better way?

contentStream.setFont(pdfFont, fontSize);

contentStream.beginText();
contentStream.newLineAtOffset(117, 724);
contentStream.setCharacterSpacing(9.2f);
contentStream.showText("ABCSKL72E12N408X");
contentStream.endText();

contentStream.beginText();
contentStream.newLineAtOffset(117, 700);
contentStream.setCharacterSpacing(0f);
contentStream.showText("NAME");
contentStream.endText();